Harddrive Custom Grooved Derby Cover Black - 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.
Transform your Twin Cam primary with the Harddrive Custom Grooved Derby Cover in a sleek black finish. This cover features a bold, raised design complemented by three milled grooves, giving your engine a more muscular and intentional appearance. It's a direct replacement that instantly elevates your bike's aesthetic.
Why riders pick this
- Prominently raised design for visual depth
- Three aggressive milled grooves
- Durable black finish for a custom look
- Direct bolt-on replacement for Twin Cam primaries
- Pairs with matching Harddrive points covers
For riders who prefer a darker, more aggressive stance, the Harddrive Custom Grooved Derby Cover in black is an ideal choice. Designed for Harley-Davidson Twin Cam models, this cover replaces your factory primary cover with a custom piece that features a prominent raised profile and distinctive milled grooves. The black finish provides a stealthy, modern look that pairs well with other blacked-out components on your V-twin.
Aggressive Style, Defined
- Features a prominently raised design for added visual impact
- Three precision-milled grooves create a muscular, custom aesthetic
- Durable black finish for a stealthy and modern appearance
- Direct bolt-on installation onto Twin Cam primary covers
- Complements matching Harddrive points covers for a unified look
Seamless Customization
Upgrading to the Harddrive Custom Grooved Derby Cover is a straightforward process, designed for a direct bolt-on fitment. This makes it an easy way to achieve a significant visual upgrade without complex modifications. Whether you're blacking out your entire bike or simply adding custom accents, this derby cover provides a strong foundation. Consider pairing it with a matching Harddrive points cover to achieve a fully coordinated and aggressive engine aesthetic.
Specifications
- Brand: Harddrive
- Manufacturer Part #: B-38-1B
- UPC: 191361279003
- Finish: Black
- Length: 11 in
- Width: 9 in
- Height: 1 in
- Weight: 0.9 lbs
- Country of Origin: China (Taiwan)
Common questions
Will this derby cover fit my specific Twin Cam model?
This Harddrive Custom Grooved Derby Cover is designed to fit Harley-Davidson Twin Cam engines. Please confirm fitment for your exact year and model using our Shop by Bike tool before ordering.
Is this cover available in other finishes?
Yes, this custom derby cover is also available in a triple chrome-plated finish. Please check our catalog for the chrome version if you prefer that aesthetic.
Does this cover come with a new primary gasket?
No, the derby cover is sold separately from primary gaskets. We recommend replacing your primary gasket whenever you remove the derby cover to ensure a leak-free seal.
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 | Clutch |
| SKU | 820-51871 |
| WEIGHT | 0.9 lb |
