Harddrive Twin Cam Cylinder 3.875" Bore Black w/Machined Fins - Harley Twin Cam
About Harddrive
Harddrive is the house performance and replacement line built for American V-twins, covering everything from engine hardware and electrical to controls, lighting and chassis parts. The range is aimed squarely at Harley-Davidson and Indian riders who want a direct-fit part without dealer pricing, and it spans decades of model years — from Evolution-era Softails to current Milwaukee-Eight baggers.
Rebuild or upgrade your Twin Cam engine with the Harddrive Cylinder, featuring a 3.875" bore for both stock replacement and displacement increases. Crafted from aluminum with robust cast iron sleeves, these cylinders are designed for durability and performance. The powder-coated black finish with machined fins ensures a factory-correct appearance.
Why riders pick this
- 3.875" bore for stock or big bore applications
- Aluminum with cast iron sleeves for durability
- Black powder coat with machined fins for OEM look
- Sold individually for flexible purchasing
- Requires finish honing and piston matching
When it's time to refresh your Twin Cam engine, these Harddrive cylinders offer a solid foundation. The combination of aluminum construction and cast iron sleeves provides excellent heat dissipation and wear resistance, crucial for the demands of a high-performance V-twin. The 3.875" bore is versatile, supporting either a direct stock replacement or serving as the base for a displacement increase, giving you options for how you want to build your motor.
Precision Engineering and Finish
- Durable aluminum construction with cast iron sleeves
- Powder-coated black finish with contrast-cut machined fins
- Versatile 3.875" bore for rebuilds or big bore projects
- Designed to maintain a factory-correct aesthetic
- Sold individually to match your specific engine needs
Ready for Custom Builds
These cylinders are sold individually, giving you the flexibility to purchase exactly what you need for your project. Please note that they require finish honing and piston matching before installation to ensure optimal performance and longevity. This allows your builder to precisely fit them to your chosen pistons, whether you're sticking with stock displacement or chasing more cubes. Ideal for Twin Cam owners looking for quality components that support serious engine work, from a simple refresh to a full-blown performance build.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 88461
- UPC: 191361122354
- Bore: 3.875"
- Length: 10 in
- Width: 10.2 in
- Height: 9.6 in
- Weight: 10.015 lbs
- Country of Origin: Japan
Common questions
Are these cylinders sold as a pair or individually?
These Harddrive Twin Cam cylinders are sold individually, allowing you to purchase the exact quantity needed for your engine build or replacement.
Do these cylinders require any preparation before installation?
Yes, these cylinders must be finish-honed and matched to your pistons before installation to ensure proper fitment and optimal engine performance.
Will these cylinders fit my specific Twin Cam model?
These cylinders are designed for Twin Cam V-twin motorcycles, including Harley-Davidson and Indian Motorcycle applications. For precise fitment, please confirm compatibility with your specific year and model using our Shop by Bike feature.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Harddrive |
| TYPE | Engine |
| SKU | 820-51547 |
| WEIGHT | 10.02 lb |
