Kb Pistons Hypereutectic Cast Piston 9.3:1 .010 - 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.
Upgrade your Twin Cam 88 to 95 cubic inch engine with a Kb Pistons Hypereutectic Cast Piston. This piston is designed with a 9.3:1 compression ratio and a .010 oversized bore, making it an excellent choice for riders seeking a performance increase. Its advanced alloy composition ensures quiet operation and extended durability for air-cooled Harley engines.
Why riders pick this
- 16% silicon hypereutectic alloy
- Low thermal expansion for tight clearances
- Quiet engine operation and reduced wear
- Designed for 9.3:1 compression ratio
- .010 inch overbore for specific builds
The Kb Pistons Hypereutectic Cast Piston is engineered for Twin Cam 88 to 95 cubic inch engines, delivering a 9.3:1 compression ratio with a .010 oversized bore. Constructed from a specialized 16% silicon hypereutectic alloy, this piston is built to effectively resist thermal expansion. This critical feature allows for tighter piston-to-wall clearances, which translates to quieter engine running and significantly extended ring life in your air-cooled Harley-Davidson motor.
Optimized for Air-Cooled V-Twins
- Advanced 16% silicon hypereutectic alloy construction
- Minimizes thermal expansion for consistent performance
- Ensures tight piston-to-cylinder clearances
- Promotes quieter engine operation and reduced wear
- Designed for 9.3:1 compression ratio with a .010 overbore
Reliable Power for Your Ride
These pistons are an excellent foundation for builds ranging from stock replacements to mild performance upgrades. Their robust design supports the demands of daily riding while providing the reliability you expect. Consider pairing them with a performance cam and a dyno tune to fully realize the potential of your Twin Cam engine. Always confirm bore specifications to ensure a perfect fit.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB348.010
- UPC: 800745068439
- Compression Ratio: 9.3:1
- Overbore: .010 in
- Engine Application: Twin Cam 88 to 95 cubic inch
- Length: 9.5 in
- Width: 4.8 in
- Height: 4.6 in
- Weight: 2.5 lbs
- Country of Origin: Mexico
Common questions
What engine displacement does this piston fit?
This Kb Piston is designed for Twin Cam 88 to 95 cubic inch air-cooled engines, featuring a 9.3:1 compression ratio and a .010 overbore.
Is this piston suitable for high-performance builds?
These hypereutectic pistons are best suited for stock or mild compression ratios up to 10.5:1 running on pump fuel.
Do I need new rings with these pistons?
Pistons are typically installed with new piston rings to ensure proper sealing and performance. Always follow manufacturer recommendations for ring selection and installation.
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 | 824-01363 |
| WEIGHT | 2.5 lb |
| 9.3 | 1 Compression |
