Kb Pistons Hypereutectic Cast Piston 7.2:1 .005 - Harley Shovelhead 80ci
About Kb Pistons
KB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.
Unleash the full potential of your Shovelhead 80ci engine with the Kb Pistons Hypereutectic Cast Piston. These pistons are engineered for optimal performance in air-cooled V-twin motors, providing a significant upgrade for riders chasing reliable power.
Why riders pick this
- 16% silicon hypereutectic alloy construction
- Low thermal expansion for tight clearances
- Optimized 7.2:1 compression ratio
- Enhanced ring seal and reduced engine noise
- Designed for stock to mild builds on pump fuel
These Kb Pistons Hypereutectic Cast Pistons are specifically designed for Shovelhead 80ci engines, built with a 7.2:1 compression ratio and a .005 oversize. The advanced hypereutectic alloy, featuring 16% silicon content, ensures minimal thermal expansion and tight piston-to-cylinder clearance. This translates to a quieter running engine with superior ring seal, making them ideal for stock and mild compression builds that run on pump fuel.
Engineered for Performance and Durability
- High 16% silicon content in hypereutectic alloy for resilience
- Low thermal expansion rate allows for tighter piston-to-cylinder clearance
- Optimized ring seal for improved engine efficiency
- Reduced engine noise for a smoother ride
- Suitable for stock to mild compression ratios on pump fuel
The Foundation for a Strong Shovelhead Build
Whether you're rebuilding a classic or upgrading for better street manners, these pistons provide a solid foundation. The precise manufacturing ensures a straightforward installation for experienced builders. Pair them with a fresh top-end gasket kit and a careful break-in for lasting performance on your Harley Touring, Softail, or Dyna Shovelhead.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB288.005
- UPC: 800745063632
- Engine: Shovelhead 80ci
- Compression Ratio: 7.2:1
- Clearance: .005 in
- Weight: 2.5 lbs
- Country of Origin: Mexico
Common questions
What compression ratio is this piston designed for?
This piston is designed for a 7.2:1 compression ratio, ideal for stock to mild compression air-cooled Shovelhead 80ci engines running on pump fuel.
What does '.005' refer to?
The '.005' indicates that the piston is .005 inches larger than the standard bore. Your cylinders will need to be machined to this precise oversize for proper fitment.
Will these pistons improve engine noise?
Yes, the hypereutectic alloy's low thermal expansion allows for tighter piston-to-cylinder clearance, which can contribute to reduced engine noise and quieter operation.
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 | Kb Pistons |
| TYPE | Piston kits & Components |
| SKU | 824-01151 |
| WEIGHT | 2.5 lb |
