Kb Pistons Hypereutectic Cast Piston 9.3:1 .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.
Upgrade your Twin Cam 88 to 95ci air-cooled Harley engine with a Kb Pistons Hypereutectic Cast Piston. This piston is designed for a 9.3:1 compression ratio and a .020 oversized bore, providing a robust solution for your build. Its advanced alloy construction minimizes thermal expansion for improved durability and quieter operation.
Why riders pick this
- 16% silicon hypereutectic alloy construction
- Low thermal expansion rate
- Tight piston-to-cylinder-wall clearances
- Optimal ring seal and reduced blow-by
- Suitable for stock to mild compression ratios
The Kb Pistons Hypereutectic Cast Piston is engineered for Twin Cam 88 to 95 cubic inch air-cooled Harley-Davidson engines, offering a 9.3:1 compression ratio and a .020 oversized bore. This piston is cast from a high-quality 16% silicon hypereutectic alloy, which is key to its performance. The alloy's properties ensure low thermal expansion and tight piston-to-wall clearances, leading to optimal ring seal and reduced blow-by. This translates to quieter engine operation and significantly reduced cylinder wear, making it a reliable choice for your V-twin.
Core Benefits for Your Engine
- Constructed from 16% silicon hypereutectic alloy
- Features a low thermal expansion rate for consistent performance
- Ensures tight piston-to-cylinder-wall clearances
- Promotes optimal ring seal and reduced blow-by
- Suitable for stock to mild compression ratios on pump fuel
Building a Stronger Twin Cam
These pistons provide a durable and efficient upgrade for riders looking to rebuild or enhance their Twin Cam engine. The .020 overbore offers a fresh surface for new rings and cylinders, ensuring a tight seal and consistent power delivery. For the best performance, consider a comprehensive engine build that includes a performance camshaft and a professional dyno tune to dial in your air/fuel mixture.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB348.020
- UPC: 800745068453
- Compression Ratio: 9.3:1
- Engine Displacement: Twin Cam 88 to 95ci
- Length: 9.5 in
- Width: 4.8 in
- Height: 4.6 in
- Weight: 2.5 lbs
- Country of Origin: Mexico
Common questions
What compression ratio is this piston rated for?
This piston is designed for a 9.3:1 compression ratio, suitable for stock to mild builds up to 10.5:1 on pump fuel.
Why choose hypereutectic pistons over forged?
Hypereutectic pistons offer excellent thermal stability and tight clearances for quieter operation and reduced wear, making them ideal for street applications and mild performance builds on pump fuel.
Will this fit my specific Twin Cam model?
This piston is designed for Twin Cam 88 to 95 cubic inch Harley-Davidson engines with a .020 overbore. Please confirm your engine's displacement and current bore size before purchasing.
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 | 824-01364 |
| WEIGHT | 2.5 lb |
| 9.3 | 1 Compression |
