Kb Pistons Hypereutectic Cast Piston 8.3:1 .020 - 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.
Upgrade your Harley Shovelhead 80ci engine with the Kb Pistons Hypereutectic Cast Piston, designed for an 8.3:1 compression ratio. These pistons are precision-machined to a .020 oversize, offering a significant improvement for your V-twin powerplant.
Why riders pick this
- 16% silicon hypereutectic alloy construction
- Low thermal expansion for tight clearances
- Optimized 8.3:1 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 crafted for Harley Shovelhead 80ci engines, providing an 8.3:1 compression ratio and a .020 oversize. The advanced 16% silicon-content hypereutectic alloy is engineered to resist thermal expansion, allowing for a tighter piston-to-wall clearance. This critical feature translates to improved ring seal and quieter operation, essential for the demands of air-cooled engines. They are optimized for stock to mild compression ratios up to 10.5:1 and perform best with pump fuel.
Optimized Design for Shovelhead Power
- Hypereutectic alloy with 16% silicon content for thermal stability
- Low thermal expansion enables tight piston-to-cylinder clearance
- Enhanced ring seal for consistent performance
- Quiet engine operation from precise fitment
- Suitable for stock to mild compression ratios on pump fuel
Build Your Shovelhead Right
Choosing the correct piston is fundamental for a reliable and powerful Shovelhead engine. This Kb Piston, with its .020 oversize, requires your cylinders to be bored and honed to match for optimal fitment. This ensures maximum efficiency and longevity for your motor. Ideal for riders looking to rebuild or upgrade their Harley Touring, Softail, or Dyna Shovelhead for improved street performance.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB297.020
- UPC: 800745064479
- Compression Ratio: 8.3:1
- Oversize: .020
- Engine Displacement: 80ci (Shovel)
- Weight: 2.5 lbs
- Country of Origin: Mexico
Common questions
What compression ratio is this piston rated for?
This piston is rated for an 8.3:1 compression ratio, suitable for stock to mild builds up to 10.5:1 on pump fuel for Shovelhead 80ci engines.
What does '.020 oversize' mean?
The '.020 oversize' means the piston is .020 inches larger than the standard bore. Your cylinders will require machining to this exact size for proper fitment.
Are these pistons compatible with high-performance builds?
These hypereutectic pistons are best suited for stock to mild compression ratios up to 10.5:1. For higher performance or racing applications, consult with a builder.
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 | 824-01159 |
| WEIGHT | 2.5 lb |
