Kb Pistons Forged Alloy 10.5:1 Standard Bore 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.
Elevate your Twin Cam 96 to 103ci engine's performance with Kb Pistons forged alloy pistons. These pistons feature a 10.5:1 compression ratio and a standard bore, perfect for riders seeking more power without major cylinder modifications.
Why riders pick this
- 10.5:1 compression ratio for increased power
- Standard bore size for straightforward installation
- Forged 4032 alloy construction for extreme durability
- Resists detonation and pre-ignition in demanding conditions
- Includes all rings, wrist pins, and locks
Building a high-performance Twin Cam means starting with a solid foundation. This Kb Pistons forged alloy piston kit delivers precisely that, designed for Twin Cam 96 to 103ci engines. The 10.5:1 compression ratio is a significant step up from stock, providing a noticeable increase in power and throttle response. With a standard bore size, these pistons are ideal for engines that don't require an overbore, simplifying your build process.
Uncompromising Strength and Durability
- Forged from 4032 alloy with 11% silicon for superior structural integrity
- Engineered to resist cracking and pre-ignition under extreme loads
- Fully machined construction ensures precise fitment and performance
- Coated skirts minimize friction and enhance piston longevity
- Complete kit with rings, wrist pins, and wrist pin locks included
Optimized for Power and Reliability
Whether you're hitting the open road or the drag strip, these pistons are built to withstand the demands of a high-output V-twin. Their robust design makes them an excellent choice for engines utilizing power adders like nitrous or superchargers. For optimal results, consider pairing these pistons with a performance camshaft and a custom dyno tune to fully unlock your engine's potential.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB909C.STD
- UPC: 800745152886
- Compression Ratio: 10.5:1
- Engine Displacement: 96 to 103ci Twin Cam
- Length: 6 in
- Width: 5 in
- Height: 5 in
- Weight: 2.55 lbs
- Country of Origin: Mexico
Common questions
What parts are included in this piston kit?
This kit comes complete with a pair of pistons, all necessary piston rings, wrist pins, and wrist pin locks.
Can these pistons be used with a supercharger or nitrous?
Yes, the 4032 forged alloy construction is specifically designed to provide superior crack resistance, making these pistons suitable for engines running power adders.
Do I need to re-bore my cylinders for these pistons?
These pistons are standard bore, meaning they are designed for cylinders that do not require an overbore. Always verify your cylinder condition before ordering.
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 | 824-01527 |
| WEIGHT | 2.55 lb |
| 10.5 | 1 Compression |
