Kb Pistons Forged Alloy 10.5:1 .010 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.
Push your Twin Cam 96 to 103ci engine to new levels with Kb Pistons forged alloy pistons. Featuring a 10.5:1 compression ratio and a .010 oversized bore, these pistons are engineered for riders demanding more power and durability.
Why riders pick this
- 10.5:1 compression ratio for significant power increase
- .010 oversized bore for cylinder refresh
- Forged 4032 alloy for superior crack resistance
- Coated skirts for reduced friction and extended life
- Includes all rings, wrist pins, and wrist pin locks
When you're chasing more horsepower and torque from your Twin Cam, a piston upgrade is a critical step. This Kb Pistons forged alloy piston kit is designed for Twin Cam 96 to 103ci engines, offering a stout 10.5:1 compression ratio. The .010 oversized bore provides the perfect opportunity to clean up your cylinders with a light hone, ensuring optimal ring seal and preparing your engine for serious performance gains.
Built for High-Performance Applications
- Crafted from 4032 forged alloy with 11% silicon content for extreme resilience
- Minimizes risk of cracking and pre-ignition under demanding conditions
- Fully machined for precision fit and consistent operation
- Coated skirts reduce friction, prolonging piston and cylinder life
- Complete set includes rings, wrist pins, and wrist pin locks
Ready for the Road or Race Track
These pistons are an excellent choice for any Twin Cam build, especially those incorporating power adders like nitrous or superchargers. The robust forged construction ensures they can handle the increased cylinder pressures and temperatures. Combine these with a performance cam and a precise dyno tune to unleash the full potential of your Harley-Davidson V-twin.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB909C.010
- UPC: 800745152923
- Compression Ratio: 10.5:1
- Over Size: .010
- Engine Range: Twin Cam 96 to 103ci
- Weight: 2.6 lbs
- Country of Origin: Mexico
Common questions
What components are included in this piston kit?
This kit includes a pair of pistons, all necessary piston rings, wrist pins, and wrist pin locks for installation.
Are these pistons compatible with power adders?
Yes, these pistons are manufactured from 4032 forged alloy with high silicon content, making them highly resistant to detonation and suitable for applications with power adders like nitrous or superchargers.
Will I need to modify my cylinders for these pistons?
Yes, these pistons are .010 oversized, so your cylinders will require boring and honing to this specific dimension for proper fitment and optimal performance.
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 | 824-01529 |
| WEIGHT | 2.6 lb |
| 10.5 | 1 Compression |
