Kb Pistons Hypereutectic Cast Piston 10.0:1 STD - Harley Twin Cam 96 to 103ci
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.
Maximize the efficiency of your Twin Cam 96 to 103ci engine with KB Pistons Hypereutectic Cast Pistons. Designed for optimal performance in air-cooled Harley motors, these pistons deliver a 10.0:1 compression ratio.
Why riders pick this
- 16% silicon hypereutectic alloy construction
- Low thermal expansion for tight clearances
- Optimal ring seal and quiet operation
- Designed for stock and mild compression ratios
- Standard bore size for direct fit applications
These cast pistons are formulated with a 16% silicon content, providing exceptional thermal barrier properties and low expansion rates. This advanced material science allows for incredibly tight piston-to-cylinder clearances, which is crucial for the longevity and quiet operation of air-cooled V-twin engines running on pump fuel.
Engineered for Air-Cooled Reliability
- 16% silicon hypereutectic alloy for high thermal stability
- Low thermal expansion ensures a precise fit and seal
- Promotes optimal ring seal for consistent power delivery
- Contributes to quieter engine operation and reduced wear
- Designed for stock and mild compression ratios up to 10.5:1
Solid Foundation for Your Twin Cam Build
Whether you're refreshing a tired motor or embarking on a mild performance build, these KB Pistons provide a robust and reliable foundation. Their standard bore size makes them a direct fit for many applications, simplifying the upgrade process. These pistons are built to withstand the demands of the open road, ensuring your Twin Cam runs strong for miles to come.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB409C.STD
- UPC: 800745151445
- Engine: Twin Cam 96-103 ci
- Compression Ratio: 10.0:1
- Bore Size: STD (standard)
- Length: 5.9 in
- Width: 5.8 in
- Height: 5.6 in
- Weight: 2.55 lbs
- Country of Origin: Mexico
Common questions
Will these pistons work in my stock Twin Cam engine?
Yes, hypereutectic pistons are ideal for stock compression ratios and mild builds running 10.0:1 to 10.5:1 on pump fuel.
What is the primary advantage of these hypereutectic pistons?
The main advantage is their 16% silicon content, which provides low thermal expansion for tight piston-to-cylinder clearances, reducing engine noise and wear in air-cooled applications.
Are these pistons designed for high-performance forced induction applications?
These pistons are best suited for stock to mild compression ratios on pump fuel. For high-boost or nitrous applications, forged pistons are typically recommended.
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 | 824-01373 |
| WEIGHT | 2.55 lb |
| 10.0 | 1 Compression |
