Kb Pistons Super Duty 10:1 Big Bore +.010 Pistons - Harley Twin Cam
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 with Kb Pistons Super Duty pistons. Engineered for big bore stroker builds, these pistons are designed to increase displacement and boost your compression ratio for serious power gains. This set includes all necessary rings, pins, and locks for a complete refresh.
Why riders pick this
- Designed for Twin Cam 96/103 big bore 110ci stroker builds
- 10:1 compression ratio for enhanced power output
- +.010 inch oversized bore for a precise fit
- Line2Line Abradable skirt coating reduces friction and wear
- Includes premium Hastings rings, wrist pins, and locks
- Forced wrist pin oiling ensures maximum lubrication
When you're chasing more cubes and higher compression, the Kb Pistons Super Duty line delivers. These pistons are purpose-built for Twin Cam 96/103 engines undergoing a big bore conversion up to 110 cubic inches, with a +.010 inch oversize. The 10:1 compression ratio is ideal for performance builds, providing a solid foundation for more horsepower and torque.
Engineered for Performance and Durability
- Anodized top ring groove and crown for enhanced heat resistance and longevity
- Line2Line Abradable skirt coating ensures a precise fit and quiet operation
- Premium Hastings steel nitride rings provide excellent sealing and wear characteristics
- Forced wrist pin oiling system maximizes lubrication for critical components
- Flat-top design with valve pockets accommodates 1mm oversized valves
Built for Serious Twin Cam Builds
These Super Duty pistons are a critical component for riders looking to transform their Twin Cam into a high-performance machine. Whether you're building a dedicated drag bike or a torque-monster bagger, these pistons provide the robust internals needed to handle the demands of increased displacement and compression. Pair them with a performance cam and a proper dyno tune for optimal results.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB661LCA.010
- UPC: 800745236319
- Engine Size: Big Bore TC 96/103 to 110cc
- Compression Ratio: 10:1
- Bore Oversize: +.010"
- Compression Height: 1.083"
- Top Ring Design: Flat-top, 1.2cc
- Quantity: Pair (2 pistons)
- Weight: 2.5 lbs
- Country of Origin: Mexico
Common questions
Do these pistons require cylinder boring?
Yes, these +.010 oversized pistons are designed for Twin Cam 96/103 engine blocks that have been bored to accommodate a 110 cubic inch displacement.
What kind of performance can I expect with these pistons?
These 10:1 compression pistons are a key component for increasing displacement and improving the power output of your Twin Cam engine. Final performance will depend on your complete build, including cams, cylinder head work, and tuning.
Are rings, pins, and locks included?
Yes, each pair of Kb Pistons Super Duty pistons comes complete with premium Hastings rings, wrist pins, and round wire wrist pin locks.
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 | 824-01816 |
| WEIGHT | 2.5 lb |
| 10 | 1 Compression |
