Harddrive Cast Iron 80 Shovelhead Rear Cylinder - Black
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.
This Harddrive cast iron rear cylinder is designed for 80-cubic-inch Shovelhead engines. It's built for stock replacement or big-bore displacement increases and is sold individually, requiring finish honing and piston matching before installation.
Why riders pick this
- Cast iron construction for durability
- Black powder-coated finish with machined fins
- Designed for 80 cubic inch Shovelhead engines
- Suitable for stock replacement or big-bore builds
- Requires finish honing and piston matching
When undertaking a Shovelhead engine build, selecting the right components is paramount for performance and reliability. This Harddrive rear cylinder is made from robust cast iron and features a black powder-coated finish with machined fins, offering both durability and a classic look. It's a critical component for restoring or upgrading your 80 cubic inch Shovelhead powerplant.
Durable Construction for Shovelhead Power
- Cast iron construction for long-term durability
- Powder-coated black finish with precision-machined fins
- Sold individually to complete your engine build
- Supports stock 80 cubic inch displacement or big-bore setups
- Requires finish honing and piston matching for optimal performance
Achieving Peak Performance on Your Shovelhead
This Harddrive rear cylinder is intended for experienced builders, as it requires professional finish honing and pairing with new pistons (sold separately) to achieve the correct tolerances and compression. This meticulous process ensures proper ring seal and maximum engine efficiency. When combined with a matching front cylinder, this component sets the stage for a powerful and reliable Shovelhead V-twin.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 34-006
- UPC: 191361166648
- Length: 8.7 in
- Width: 8.5 in
- Height: 8.5 in
- Weight: 12.56 lbs
- Country of Origin: China (Taiwan)
Common questions
Do I need to purchase a front cylinder separately?
Yes, this is a single rear cylinder. For a complete engine, you must purchase a matching front cylinder and a set of pistons, all sold separately.
Is this cylinder pre-honed and ready for pistons?
No, this cylinder requires finish honing to match your specific pistons and ensure proper fit and compression. Pistons are also sold separately.
What kind of pistons should I use with this cylinder?
You should use pistons designed for 80-cubic-inch Shovelhead engines. Always consult with your engine builder to select pistons that will be correctly matched and honed to these cylinders.
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 | 820-51555 |
| WEIGHT | 12.56 lb |
