Kb Pistons Hypereutectic Cast Piston 10.5:1 .020 - Harley Twin Cam 88 to 95ci
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.
Enhance the performance of your Twin Cam 88 or 95ci engine with KB Pistons Hypereutectic Cast Pistons. These pistons are specifically engineered for air-cooled Harley applications, featuring a 10.5:1 compression ratio.
Why riders pick this
- 16% silicon hypereutectic alloy construction
- Low thermal expansion for tight clearances
- Optimal ring seal and reduced engine noise
- Suitable for stock to mild 10.5:1 compression
- Designed for air-cooled Twin Cam engines
Crafted from a 16% silicon hypereutectic alloy, these pistons boast high thermal barrier properties and low expansion rates. This design allows for tighter piston-to-cylinder clearances, which translates to reduced engine wear and quieter operation in your V-twin.
Precision Engineering for Your V-Twin
- 16% silicon hypereutectic alloy for superior thermal stability
- Low thermal expansion ensures precise piston-to-cylinder fit
- Optimized ring seal for improved engine efficiency
- Reduces unwanted engine noise and wear over time
- Compatible with stock or mild compression ratios up to 10.5:1
Reliable Performance for Street and Mild Builds
These KB Pistons are ideal for riders looking to rebuild or upgrade their Twin Cam 88 or 95ci engine with a focus on reliability and smooth operation. Designed to run on pump fuel, they provide a strong foundation for street-focused bikes or mild performance builds. Always confirm the correct bore size for your specific engine before ordering.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB411.020
- UPC: 800745152305
- Engine: Twin-Cam 88 and 95ci
- Compression Ratio: 10.5:1
- Piston Size: .020 over
- Weight: 2.5 lbs
- Country of Origin: Mexico
Common questions
What compression ratio are these pistons designed for?
These hypereutectic pistons are rated for stock to mild compression ratios up to 10.5:1 on pump fuel.
What is the benefit of hypereutectic alloy in these pistons?
The 16% silicon hypereutectic alloy provides high thermal barrier properties and low expansion, allowing for tighter piston-to-cylinder clearances, reduced wear, and quieter operation.
Do I need to re-bore my cylinders for these pistons?
These pistons are .020 oversized. You will need to confirm your cylinder bore requirements to ensure a proper fit. Consult your engine 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 | 824-01370 |
| WEIGHT | 2.5 lb |
| 10.5 | 1 Compression |
