KB Pistons Forged Alloy 9.5:1 .005" Oversized Piston Kit - 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 output of your Twin Cam 96 or 103ci engine with this KB Pistons forged alloy piston kit. Featuring a 9.5:1 compression ratio and a .005 inch oversized bore, these pistons are engineered for riders seeking a robust and reliable foundation for their performance build. Crafted for superior strength, they are ready to handle the increased demands of a modified V-twin.
Why riders pick this
- Upgrade Twin Cam 96 to 103ci with 9.5:1 compression
- Forged 4032 alloy with 11% silicon for strength
- Superior crack resistance for power adders
- Coated skirts for reduced friction and extended life
- Complete kit with rings, wrist pins, and wrist pin locks
- Ideal for demanding street or race applications
When rebuilding or upgrading your Twin Cam 96 or 103ci engine, choosing pistons that can withstand serious power is paramount. This KB Pistons forged alloy kit offers a 9.5:1 compression ratio and a .005 inch oversized bore, providing a solid upgrade path. Constructed from 4032 forged alloy with an 11% silicon content, these pistons are specifically designed for superior crack resistance, especially under the extreme conditions of detonation or pre-ignition. This makes them an excellent choice for both high-performance street applications and race-oriented builds, particularly those running power adders.
Engineered for High-Stress Applications
- Premium 4032 forged alloy with 11% silicon for ultimate strength
- Superior crack resistance against detonation and pre-ignition
- Coated skirts reduce friction and enhance longevity for Twin Cam and Sportster
- Includes all rings, wrist pins, and wrist pin locks for a complete assembly
- Designed for Twin Cam 96 to 103ci with 9.5:1 compression
The Heart of a Performance V-Twin
These KB Pistons are engineered to be the core of a powerful and reliable V-twin engine build. The kit comes complete with piston rings, wrist pins, and wrist pin locks, simplifying your assembly process. Whether you're performing a refresh, increasing compression, or preparing for forced induction, these pistons provide the durability and performance characteristics needed to push your Harley-Davidson or Indian Motorcycle to its limits, delivering consistent power and peace of mind.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB907C.005
- UPC: 800745153142
- Compression Ratio: 9.5:1
- Oversized Bore: .005 inch
- Alloy: 4032 forged with 11% silicon
- Weight: 2.6 lbs
- Country of Origin: Mexico
Common questions
Will my cylinders need to be bored for these pistons?
Yes, these pistons are .005 inch oversized and require your Twin Cam 96 or 103ci cylinders to be bored to match by a qualified machine shop for proper fitment.
Are these pistons suitable for engines with forced induction?
Absolutely. The 4032 forged alloy with 11% silicon content is specifically engineered to provide superior crack resistance under detonation, making them an excellent choice for supercharged, turbocharged, or nitrous-fed engines.
What components are included with this piston set?
This kit comes complete with a pair of forged pistons, a full set of piston rings, wrist pins, and wrist pin locks, providing everything needed for piston 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 | 824-01523 |
| WEIGHT | 2.6 lb |
