Kb Pistons Forged Alloy 9.5:1 .020 Over Piston Kit - Harley Twin Cam 96-103ci
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.
Unleash the full potential of your Twin Cam 96 to 103ci engine with Kb Pistons forged alloy pistons. Designed for riders pushing the limits, these pistons offer a 9.5:1 compression ratio and a .020 oversized bore for enhanced performance.
Why riders pick this
- Forged 4032 alloy for maximum strength and resilience
- 9.5:1 compression ratio for a performance boost
- .020 oversized bore for optimal cylinder refresh
- Coated skirts reduce friction and wear
- Includes rings, wrist pins, and locks for complete installation
When you're building a Twin Cam engine that's going to see serious street miles or track time, especially with power adders, you need components that can take the heat. Kb Pistons delivers with this forged alloy piston kit, purpose-built for Twin Cam 96 to 103ci applications. The 9.5:1 compression ratio is a solid upgrade, and the .020 oversized bore allows for a fresh cylinder hone, ensuring optimal ring seal and power.
Engineered for Extreme Conditions
- Constructed from 4032 forged alloy with 11% silicon content for durability
- Resists cracking and pre-ignition under high-stress conditions
- Coated skirts reduce friction and extend piston life
- Includes all necessary rings, wrist pins, and wrist pin locks
Boost-Ready Performance
These pistons are ideal for riders who are running power adders like nitrous oxide or superchargers. The robust forged construction provides the peace of mind that your bottom end can handle the increased cylinder pressures. Pair these with a performance cam and a proper dyno tune for a significant bump in usable torque and horsepower.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB907C.020
- UPC: 800745153180
- Bore Size: .020 oversized
- Compression Ratio: 9.5:1
- Engine Compatibility: Twin Cam 96 to 103ci
- Weight: 2.6 lbs
- Country of Origin: Mexico
Common questions
What is included with this piston kit?
This kit includes a pair of pistons, all necessary rings, wrist pins, and wrist pin locks for a complete installation.
Are these pistons suitable for engines with power adders?
Yes, the 4032 forged alloy construction is specifically engineered to handle the increased stress and heat generated by power adders like nitrous or superchargers.
Do I need to bore my cylinders for these pistons?
These pistons are .020 oversized, meaning your cylinders will need to be bored and honed to this specification for proper fitment. Always confirm with 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 | 824-01525 |
| WEIGHT | 2.6 lb |
| 9.5 | 1 Compression |
