Looking to get more power out of your Harley in 2026 but feeling overwhelmed by all the upgrade options? You’re not alone. Many riders struggle to find the right big bore kit that truly boosts performance without causing installation headaches or reliability issues.
It can be frustrating sorting through countless products and technical specs when all you want is a smooth, powerful ride.
If you want to boost your Harley’s power in 2026, check out top Twin Cam 88 big bore kits like the S&S 95in Black Big Bore Kit and the Wiseco 10.5:1 compression piston kit for stronger combustion.
The S&S 910-0642 and 910-0481 kits also offer reliable displacement upgrades.
Don’t forget to pick matching installer and puller tools like Wsays or AUFER for smooth installation.
Keep going to explore features and find the perfect fit for your ride.
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S&S Cycle S&S 95 in. Twin Cam Black Big ...
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Wsays Inner Cam Bearing Installer and Pu...
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munirater Inner Cam Bearing Installer Pu...
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S&S 95in Twin Cam Black Big Bore Kit Harley
- Street American V-Twin > ENGINE > Engine Other
- Application: 99-06 TWIN CAM (EXC. 06 FXD)
- S and S Cycle 910-0204.
Experience a significant boost in your Harley Davidson Twin Cam’s performance with the S&S 95in Twin Cam Black Big Bore Kit. This upgrade transforms your engine’s displacement to 95 cubic inches, delivering enhanced power and sharper throttle response for a more engaging ride. It’s designed to improve your bike’s performance where it matters most.
The kit fits models from 1999 to 2006, excluding the 2006 FXD. Its precise engineering ensures a seamless installation, reducing compatibility issues. With a weight of 26.3 pounds and compact dimensions (19.6 x 9.3 x 8.2 inches), it integrates neatly without compromising your bike’s balance.
Maintenance is straightforward, thanks to S&S Cycle’s well-known quality standards. The kit’s durable construction supports long-term use while requiring routine checks typical for big bore upgrades. This means you can enjoy consistent power gains without frequent overhauls.
This engine kit is ideal for riders seeking a reliable way to increase displacement without extensive modifications. Its focused design addresses common performance limitations, offering a practical solution for enhanced riding dynamics and engine responsiveness.
While it does add some weight, careful installation ensures your bike maintains optimal handling. The exclusion of the 2006 FXD model is important to note for compatibility reasons. Overall, the kit balances power gains with dependable fitment and ease of maintenance.
Best for: Harley Davidson Twin Cam owners from 1999 to 2006 (excluding 2006 FXD) aiming to boost engine displacement and performance.
What We Like:
- Increases engine size to 95 cubic inches for stronger power delivery
- Precisely engineered for compatible Harley models
- Compact and manageable dimensions for easier installation
- Durable build supports consistent, long-term use
Specification:
| Specification Title | Detailed Description |
|---|---|
| Compatible Models | Harley Davidson Twin Cam 1999-2006 (excl. 2006 FXD) |
| Engine Displacement | 95 cubic inches |
| Kit Weight | 26.3 pounds |
| Kit Dimensions | 19.6 x 9.3 x 8.2 inches |
| Manufacturer | S&S Cycle |
Wsays Cam Bearing Installer and Puller Tool
- 【Fitment】This inner cam bearing installer and puller tool is...
- 【Portable Toolbox】Our cam bearing tools come with a blue...
- 【Durable Quality Materials】This installer and puller tool are...
- 【Simple To Use】Optimize the structure of the tool, simplify...
- 【Package Included】1 x Black steel cam bearing plate, 4 x...
The Wsays Cam Bearing Installer and Puller Tool is designed to make your work on Harley Twin Cam engines smoother and more efficient. This tool tackles the common challenge of installing and removing camshaft needle bearings with precision and ease. Its thoughtful design reduces the risk of damage to delicate engine parts during maintenance.
Crafted from durable 45# steel, this tool ensures long-lasting use and strong resistance to corrosion. This means you can count on it to perform reliably over time, even with frequent use. The sturdy construction also supports consistent, accurate bearing installation and removal.
The kit includes both installer and puller tools, along with a steel bearing plate, screws, a stick, and easy-to-follow instructions. Everything is organized in a compact blue toolbox, making storage and transport simple. This helps you stay organized and ready for any maintenance task.
Using the Wsays Cam Bearing Tool significantly speeds up service times on Harley Touring, Softail, Dyna, and Trike models equipped with Twin Cam engines from 1999 to 2017. It eliminates guesswork and improves your workflow, saving you effort and time.
While this tool is specialized for specific Harley models, it’s an essential asset for mechanics who require precision and durability. Weighing just over 5 pounds, it balances portability with robust build quality.
Best for: Motorcycle enthusiasts and mechanics working on Harley Touring, Softail, Dyna, or Trike models with Twin Cam engines from 1999 to 2017 needing a reliable cam bearing installation and removal tool.
What We Like:
- Durable 45# steel construction for long-lasting corrosion resistance
- Includes installer, puller, bearing plate, screws, and instructions in one kit
- Compact toolbox keeps tools organized and portable
- Speeds up camshaft needle bearing installation and removal
- Designed specifically for Harley Twin Cam engines from 1999 to 2017
Specification:
| Specification Title | Detailed Description |
|---|---|
| Material | 45# Steel |
| Compatibility | Harley Twin Cam engines, 1999-2017 models |
| Included Tools | Installer, puller, steel bearing plate, screws, stick |
| Weight | Approximately 5.2 pounds |
| Storage | Portable blue toolbox |
Munirater Inner Cam Bearing Installer Puller Tools
- Replacement for - for all TC 88 96 103 that use the b148 or the...
- Premium Material - The tool comes with black oxide coating and...
- Advantage - We have two completely independent pullers...
- Easy to Use - Easy installation
- Package Includes - One set inner cam bearing installer & puller...
Crafted from steel with a black oxide coating, these tools resist rust and snapping, ensuring long-lasting durability. They automatically manage chain tension during use, which helps improve gear shifting and reduces noise. This thoughtful feature enhances the overall performance of your bike, making maintenance smoother and more reliable.
The tool’s design traps needle bearings during installation, preventing them from falling into the crankcase and causing costly damage. It presses on the bearing’s outer diameter, ensuring a secure and precise fit every time. This focus on safe installation reduces the risk of errors and extends the lifespan of your components.
Maintenance is simple because the sturdy construction stands up to repeated use without wearing down quickly. Even if one puller is lost, the other remains fully functional, adding convenience and saving you from immediate replacement costs. This makes the set a practical choice for both professional mechanics and dedicated riders.
Best for: Riders and mechanics working on TC 88, 96, and 103 models who need durable, reliable tools for easy installation and removal of inner cam bearings.
What We Like:
- Durable steel construction with rust-resistant black oxide coating
- Dual-function design with two independent pullers for versatility
- Automatically manages chain tension to improve gear shifting
- Needle bearing trap protects crankcase during installation
- Reliable and easy-to-use tool set for professional and DIY use
Specification:
| Specification Title | Detailed Description |
|---|---|
| Material | Steel with black oxide coating |
| Weight | 3600 grams |
| Compatibility | TC 88, TC 96, and TC 103 models |
| Functions | Bearing installation and bearing puller |
| Special Features | Chain tension management, needle bearing trap |
| Set Includes | Two independent pullers |
Wiseco HD Twin Cam 88 Big Bore 10.51 CR (AP) Piston Kit
- Wiseco Powesports HD Twin Cam 88 Big Bore 10.5:1 CR (AP)
Experience enhanced engine performance with the Wiseco HD Twin Cam 88 Big Bore 10.51 CR (AP) Piston Kit. Designed specifically for Twin Cam 88 engines, this kit addresses common issues like wear and low compression, improving overall engine efficiency and power output.
The 10.5:1 compression ratio boosts combustion, helping your engine run smoother and more responsively. This makes it an excellent choice for those rebuilding their V-Twin or looking for reliable upgrades for racing applications.
Each piston is crafted for a precision fit, which reduces the risk of engine damage and extends the life of your rebuild. Weighing just 1.5 pounds, these pistons contribute to better engine balance and quicker throttle response.
Maintenance becomes straightforward with this kit, as it’s engineered for durability and consistent performance under demanding conditions. The robust design helps reduce wear, allowing you to enjoy longer intervals between rebuilds.
While this kit suits Twin Cam 88 engines perfectly, it is not compatible with other platforms. Also, the return policy is limited to 30 days, so it’s important to ensure this is the right fit before purchase.
Best for: V-Twin enthusiasts and mechanics seeking a durable, high-performance piston kit optimized for Twin Cam 88 engines, ideal for rebuilds and racing upgrades.
What We Like:
- Expertly designed for optimal power and durability with over 80 years of experience
- High 10.5:1 compression ratio for improved combustion efficiency
- Lightweight 1.5-pound pistons enhance engine responsiveness
- Precision manufacturing ensures reliable, long-lasting fit
- Durable construction reduces maintenance needs and wear
Specification:
| Specification | Description |
|---|---|
| Engine Compatibility | Twin Cam 88 V-Twin engines |
| Compression Ratio | 10.5:1 |
| Piston Weight | Approximately 1.5 pounds |
| Bore Size | Big Bore for enhanced displacement |
| Intended Use | Engine rebuilds and racing |
| Return Policy | 30 days (Amazon) |
S&S Cycle 910-0642 Bolt-In Sidewinder 4in. Big Bore Kit – 100in. – Silver
Unlock greater power and smoother rides with the S&S Cycle 910-0642 Bolt-In Sidewinder 4in. Big Bore Kit. Designed specifically for Twin Cam 88 engines, this kit transforms your motorcycle’s performance with ease. Its bolt-in design means you can upgrade without complex modifications.
This 100 cubic inch kit is crafted to deliver enhanced power while maintaining reliability. The silver finish adds a sleek touch that complements your bike’s style. Weighing 26.9 pounds and sized at 19.5 by 9 by 8 inches, it fits neatly into your existing setup.
Maintenance is straightforward with this kit. Its durable construction ensures long-lasting use, while the bolt-in nature simplifies future servicing or replacement. You won’t need specialized tools or extensive mechanical knowledge to keep it running smoothly.
By increasing your engine’s displacement, the Sidewinder kit addresses the common issue of limited power in stock Twin Cam 88 models. Riders experience improved throttle response and a more engaging ride without sacrificing reliability.
While the kit adds some weight, this trade-off is balanced by the significant performance boost it provides. It’s a practical upgrade for riders who want more power without the hassle of a full engine rebuild.
Best for: Motorcycle enthusiasts with Twin Cam 88 engines seeking an easy-to-install big bore kit to enhance performance and power.
What We Like:
- Straightforward bolt-in installation process
- Durable, high-quality construction for long-term use
- Enhances engine displacement for better power and throttle response
- Compact design that fits existing setups without modifications
Specification:
| Specification Title | Detailed Description |
|---|---|
| Product Name | S&S Cycle 910-0642 Bolt-In Sidewinder 4in. Big Bore Kit |
| Engine Compatibility | Twin Cam 88 |
| Displacement | 100 cubic inches |
| Finish | Silver |
| Weight | 26.9 pounds |
| Dimensions (L x W x H) | 19.5 x 9 x 8 inches |
| Installation | Bolt-in design, no modifications needed |
| Release Year | 2018 |
Inner Cam Bearing Installer & Puller Kits for Harley
- Cam Bearing Removal Tools for All TC 88 96 103 110 that use the...
- Replace your old damaged or broken installer and puller. This...
- The tool set comes with the 'T' pin, makes it easier to install...
- Made of high quality metal material, has black and smooth...
- Package: 1* Cam Bearing Removal Tool Kit. Having any questions...
When working on your Harley Davidson TC 88 or Dyna model, having the right tool makes all the difference. The Inner Cam Bearing Installer & Puller Kits are designed to simplify the removal and installation of inner cam bearings. This specialized tool fits b148 and b168 bearings, solving the common challenge of safely handling these components without damage.
The kit’s machined metal construction ensures durability and precision. Its polished black finish resists wear, helping maintain smooth operation over time. This thoughtful design means you can rely on consistent performance during maintenance or repair work.
Using the kit is straightforward thanks to included components like the T pin, screws, and plates. These parts secure the bearings firmly, reducing the risk of slippage or misalignment. This makes the process not only faster but also safer for both the user and the engine parts.
Weighing just over 4 pounds and measuring 9 by 6 by 2 inches, the kit is compact enough to fit in most toolboxes. It’s tailored specifically for Twin Cam and Dyna engines, ensuring compatibility and efficiency when working on these Harley models.
While it’s highly effective, the kit’s weight might feel a bit heavy for some users, and it’s limited to specific Harley models. However, its focused design provides a reliable solution for a common mechanical task that can otherwise be challenging.
Best for: Harley Davidson TC 88, 96, 103, 110 Twin Cam and Dyna owners or mechanics needing a dependable tool for inner cam bearing installation and removal.
What We Like:
- Compatible with b148 and b168 inner cam bearings
- Durable machined metal with polished black finish
- Includes securing components for safe installation
- Compact and portable size for easy handling
Specification:
| Specification Title | Detailed Description |
|---|---|
| Compatible Models | Harley Davidson TC 88, 96, 103, 110 Twin Cam, Dyna engines |
| Bearing Compatibility | Fits b148 and b168 inner cam bearings |
| Material | Machined metal with polished black finish |
| Included Components | T pin, screws, plates |
| Weight | Approximately 4.11 pounds |
| Dimensions | 9 x 6 x 2 inches |
S&S Cycle 910-0481 98″ Big Bore Kit Black
- Big Bore Kits
The S&S Cycle 910-0481 98″ Big Bore Kit Black offers a solid solution for riders wanting to boost their Twin Cam 88 engine’s power and durability. Its black powder-coat finish not only looks sleek but also protects the components from wear and corrosion. This helps maintain performance over time with minimal upkeep.
Designed specifically for Twin Cam 88 engines, this kit enhances engine displacement, delivering smoother acceleration and improved torque. It’s a practical upgrade that can make a noticeable difference in everyday riding and long trips. The kit’s weight and dimensions are balanced to fit well within most Powersports setups.
Maintenance is straightforward thanks to its durable construction. The powder-coated surfaces resist rust, reducing the need for frequent touch-ups. This means less downtime and more time on the road. The kit is also compatible with a variety of Powersports applications, making it versatile for different riding styles.
While it adds some extra weight at 26.4 pounds, this is a trade-off for the increased strength and longevity it provides. Its specific fitment for Twin Cam 88 engines means it won’t suit every bike, but for those it fits, it’s a reliable, quality upgrade.
Best for: Riders looking to enhance the power and durability of their Twin Cam 88 engine with a reliable and well-reviewed big bore kit.
What We Like:
- Durable black powder-coat finish for lasting protection
- Enhances engine displacement for improved performance
- Compatible with various Powersports setups
- Simple maintenance due to corrosion-resistant design
- Designed specifically for Twin Cam 88 engines
Specification:
| Specification Title | Detailed Description |
|---|---|
| Model Number | 910-0481 |
| Engine Compatibility | Twin Cam 88 |
| Displacement | 98 cubic inches |
| Finish | Black powder-coat |
| Weight | 26.4 pounds |
| Dimensions | 16 x 10 x 13 inches |
| Manufacturer | S&S Cycle |
AUFER Twin Cam Bearing Installer and Puller Kit
- 【Fitment】The Inner Cam Bearing Removal Tools Compatible with...
- 【Material】Cam Bearing Installer Tool made of high-quality...
- 【Precise design】Adopted with special style the installation...
- 【Easy To Use】 This bearing puller tool is easy to take out...
- 【Package Included】-1 x installation plate,1 x ''T'' pin,2 x...
The AUFER Twin Cam Bearing Installer and Puller Kit is designed to make cam bearing installation and removal hassle-free. If you work on Harley-Davidson Twin Cam or Dyna models, this tool simplifies a typically tricky job. Its precise design reduces the risk of damaging bearings during maintenance.
Crafted from CNC-machined alloy steel with black oxidation, the kit offers long-lasting durability. This finish helps resist rust and wear, ensuring the tool stays reliable over time. The redesigned installation plate features deep threading and a T-pin, allowing for secure and smooth bearing insertion or extraction.
Using this kit means less guesswork and more accuracy. It fits 2 mm bore diameters and works well with grease, which helps bearings slide easily during installation. Although grease is required for optimal use, the kit contains all necessary components for a complete bearing service.
Maintenance is straightforward. The sturdy construction withstands repeated use, and the black oxidation coating helps protect against corrosion. This tool is compact enough to handle comfortably but solid enough to provide the force needed for tight-fitting bearings.
With this kit, mechanics and enthusiasts can expect precise, clean installations that extend the life of their Twin Cam engines. It’s a practical solution designed to improve workflow and reduce downtime in bearing maintenance.
Best for: Mechanics and DIY enthusiasts working on Harley-Davidson TC 88, 96, 103, 110 Twin Cam and Dyna models needing a reliable cam bearing installer and puller.
What We Like:
- Durable CNC-machined alloy steel with rust-resistant black oxidation
- Redesigned installation plate with deep threading and T-pin for precision
- Complete set of components for efficient bearing installation and removal
- Compatible with 2 mm bore diameters for smooth operation with grease
Specification:
| Specification Title | Detailed Description |
|---|---|
| Material | CNC-machined alloy steel with black oxidation |
| Compatibility | Harley-Davidson TC 88, 96, 103, 110 Twin Cam & Dyna |
| Bearing Types Supported | B148 and B168 |
| Installation Plate Features | Deep threading and T-pin for secure bearing handling |
| Bore Diameter Fit | 2 mm |
| Weight | 1780 grams |
| Included Components | Installation plate, T-pin, bolts, cover bolts, screws |
Factors to Consider When Choosing a Twin Cam 88 Big Bore Kit
When choosing a Twin Cam 88 big bore kit, you’ll want to check its engine compatibility and the quality of materials used. Consider how much performance boost it offers and how complex the installation will be.
Also, don’t forget to review the warranty and support options before making your decision.
Engine Compatibility Range
Choosing the right Twin Cam 88 big bore kit means understanding the compatibility range across various Harley Davidson models from 1999 to 2017. You’ll find kits designed for TC 88, 96, 103, and 110 engines, but compatibility isn’t one-size-fits-all. Always check if the kit matches your exact engine version to avoid fitment issues.
For example, the S&S 95 in. Twin Cam Big Bore Kit excludes the 2006 FXD model, so double-check details before buying. Some kits need extra modifications for proper installation, so consider your bike’s current components like pistons and bearings. Ensuring your kit works seamlessly with your engine parts is key to unleashing reliable performance gains without headaches down the road.
Material Quality And Finish
After confirming your Twin Cam 88 big bore kit matches your engine, focus on the material quality and finish. High-grade steel is essential since it resists wear and corrosion, ensuring durability. Look for kits with black powder-coating or oxidation treatment; these finishes prevent rust and protect against environmental damage.
Precision machining matters too—it guarantees the kit fits perfectly and aligns correctly, reducing the chance of mechanical failure. Also, consider the weight of the components; heavier parts typically indicate denser, more robust materials built to handle high-performance demands.
Finally, verify compatibility with specified bearing types like B148 or B168, as this reflects the kit’s material integrity and finish, helping maintain your engine’s ideal function.
Performance Enhancement Features
Although upgrading your engine with a Twin Cam 88 big bore kit can be exciting, you need to focus on key performance features to get the most out of your investment. Look for kits that increase displacement from 88 to 95 or 100 cubic inches, boosting horsepower and torque considerably.
Higher compression ratios around 10.5:1 improve combustion efficiency, giving you better overall engine performance. Enhanced airflow from upgraded cylinders and pistons sharpens throttle response and acceleration, making your ride more responsive.
Also, choose kits optimized for aftermarket exhaust systems to maximize exhaust flow and power gains. Finally, verify the kit uses high-quality materials like forged aluminum pistons, which enhance durability and reliability, especially under demanding, high-performance conditions.
Installation Complexity Level
One key factor you need to take into account when picking a Twin Cam 88 big bore kit is the installation complexity level. Some kits come with user-friendly designs and installation aids, making the process easier even if you’re not a seasoned mechanic. You’ll want to check if the kit is tailored to fit your existing engine model, as compatibility greatly simplifies installation.
More complex kits might require additional tools or equipment, increasing the time and effort involved. Fortunately, many manufacturers provide detailed instructions and support resources to guide you through the setup. By considering these aspects, you can choose a kit that matches your mechanical skills and available tools, ensuring a smoother installation experience without unnecessary frustration.
Warranty And Support Terms
Several Twin Cam 88 big bore kits come with warranties that protect you against manufacturing defects and boost your confidence in the purchase. These warranties are often available upon request, so make sure to ask about them before buying. Many kits also include a 30-day voluntary return policy, giving you a chance to return the product if it doesn’t meet your expectations.
Keep in mind, your legal rights for returns remain intact regardless of seller policies. Warranty terms can vary widely, so it’s smart to clarify the specifics and support options upfront. Most manufacturers offer customer support for warranty questions, typically responding within a few hours to a couple of days, helping you resolve issues quickly and with minimal hassle.
Weight And Dimensions
When choosing a Twin Cam 88 big bore kit, you’ll want to pay close attention to its weight and dimensions, as these factors directly impact installation ease and performance. Kits typically weigh between 1.5 and 26.9 pounds, so a heavier kit might offer better stability and durability but could make handling and installation more challenging.
Dimensions vary widely, from compact sizes around 4.5 x 4.5 x 4.5 inches to much larger kits measuring up to 19.6 x 9.3 x 8.2 inches. Smaller kits fit tight engine bays more easily but might sacrifice some features or component size.
Knowing the exact weight and dimensions guarantees your chosen kit fits your motorcycle frame and complements other components without causing installation headaches.
Price And Availability
Prices for Twin Cam 88 Big Bore Kits can vary widely, often influenced by the manufacturer, included features, and compatibility with your bike. Some kits can cost over $1,000, so it’s crucial to balance price with what you get. Availability also matters—you might find some kits out of stock or discontinued, so check multiple retailers for consistency.
Look for a 30-day return policy to protect yourself if the kit doesn’t meet your expectations. Warranties from manufacturers offer extra peace of mind about quality and durability. Don’t forget to read customer feedback and use price reporting tools when available; these can help you spot better deals and avoid costly mistakes.
Being informed about price and availability guarantees you get the best value for your investment.
Frequently Asked Questions
How Does a Big Bore Kit Affect Fuel Efficiency?
A big bore kit can slightly reduce your fuel efficiency because it increases your engine’s displacement, making it consume more fuel to deliver extra power. However, if you tune your bike properly and ride smoothly, you might minimize that loss.
You’ll enjoy better performance, but expect to fill up a bit more often. Balancing power and fuel economy depends on how you ride and maintain your engine after installing the kit.
Can I Install a Big Bore Kit Myself Without Professional Help?
You can install a big bore kit yourself if you have solid mechanical skills and the right tools. However, it’s a complex job involving precise measurements and torque settings, so mistakes can be costly.
If you’re confident, follow the kit’s instructions carefully and take your time. If you’re unsure or lack experience, it’s best to get a professional involved to guarantee your engine runs smoothly and safely.
What Are the Warranty Options for Big Bore Kits?
You’ll usually find warranty options vary by manufacturer, but most big bore kits come with at least a one-year limited warranty covering defects in materials and workmanship.
Some brands might offer extended warranties if you register your product or use authorized installers. It’s smart to check the fine print before buying so you know what’s covered and for how long.
Keep your receipts and documentation handy to make claims easier.
Will a Big Bore Kit Increase My Bike’s Emissions?
Yes, a big bore kit can increase your bike’s emissions because it boosts engine displacement and power, often altering fuel combustion. However, the exact impact depends on the kit’s design and whether it’s tuned properly.
If you adjust your fuel system and exhaust to match, you might minimize extra emissions. Still, check local regulations, as increased emissions could affect your bike’s legal status and inspection requirements.
Are There Big Bore Kits Compatible With Non-Twin Cam Engines?
Yes, you’ll find big bore kits compatible with non-Twin Cam engines, and you’ll also discover kits designed specifically for Evolution or Milwaukee-Eight models. You can upgrade your engine’s displacement, boost power, and enhance performance without sticking strictly to Twin Cam options.
Just make sure you check compatibility carefully, follow manufacturer guidelines, and consider tuning your bike afterward to get the best results from your new kit.
Conclusion
When you upgrade with a Twin Cam 88 big bore kit, you’re boosting your Harley’s power and performance considerably—some kits increase displacement by up to 12%, giving you that thrilling ride you crave. Choosing the right kit, like the S&S or Wiseco options, guarantees reliability and smooth installation. Keep in mind the tools and bearings needed for a seamless fit.
With the right kit, you’ll feel every horsepower roar on the open road like never before! Upgrading with a Twin Cam 88 big bore kit ensures your motorcycle delivers enhanced power and an unbeatable riding experience.