KB Pistons Forged Alloy 10.5:1 .005" Oversized Piston Kit - 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.
Unleash the full potential of your Twin Cam 88 engine with this KB Pistons forged alloy piston kit, engineered for a 95 cubic inch big bore conversion. These pistons feature a 10.5:1 compression ratio and a .005 inch oversized bore, perfect for riders pushing their V-twin harder. Built to withstand the demands of high-performance applications, they provide the foundation for a reliable and powerful engine build.
Why riders pick this
- Upgrade Twin Cam 88 to 95ci with 10.5:1 compression
- Robust 4032 forged alloy construction with 11% silicon
- Superior crack resistance against detonation and pre-ignition
- Coated skirts for reduced friction and extended piston life
- Includes rings, wrist pins, and wrist pin locks for complete assembly
- Ideal for street or race applications with power adders
When you're building out a Twin Cam for serious power, whether naturally aspirated or with a power adder, your pistons are the foundation. This KB Pistons forged alloy piston kit is designed for Twin Cam 88 engines bored to 95 cubic inches, offering a 10.5:1 compression ratio and a .005 inch oversized bore. Crafted from a robust 4032 forged alloy with 11% silicon content, these pistons are built for superior crack resistance, especially under detonation or pre-ignition scenarios often encountered with aggressive tunes or forced induction.
Engineered for Extreme Performance
- Forged 4032 alloy with 11% silicon content for exceptional strength
- Fully machined construction enhances crack resistance under high stress
- Coated skirts reduce friction and improve longevity on Twin Cam applications
- Optimized for street or race use, including setups with power adders
The Core of a High-Performance Build
This piston kit is a critical component for any Twin Cam owner looking to increase displacement and compression. The included rings, wrist pins, and wrist pin locks mean you have a complete solution for your reciprocating assembly. Whether you're chasing more torque for the street or building a dedicated race machine, these pistons are designed to deliver consistent performance and durability, allowing you to run your engine harder with confidence.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB906C.005
- UPC: 800745152787
- Bore Size: .005 oversized (95 cubic inches)
- Compression Ratio: 10.5:1
- Material: 4032 forged alloy
- Weight: 2.6 lbs
- Country of Origin: Mexico
Common questions
What engine modifications are required for these pistons?
These pistons are designed for Twin Cam 88 engines that have been bored to 95 cubic inches with a .005 inch overbore. Your cylinders will require machine work to accommodate this size.
Are these pistons suitable for engines with forced induction or nitrous?
Yes, the 4032 forged alloy with 11% silicon content provides excellent crack resistance, making them well-suited for engines running power adders like superchargers, turbos, or nitrous oxide.
What is included with this piston kit?
This kit includes a pair of forged alloy pistons, all necessary piston rings, wrist pins, and wrist pin locks for a complete 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 | 824-01507 |
| WEIGHT | 2.6 lb |
