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.
Push your Twin Cam engine to new limits with Kb Pistons Super Duty pistons. Engineered for big bore stroker builds up to 117 cubic inches, these pistons feature a 10:1 compression ratio to maximize power. This set includes all necessary rings, wrist pins, and locks for a complete and reliable installation.
Why riders pick this
- Designed for Twin Cam 96/103 big bore 117ci stroker builds
- 10:1 compression ratio for enhanced power output
- +.010 inch oversized bore for a precise fit
- Line2Line Abradable skirt coating for reduced wear and noise
- Includes premium Hastings rings, wrist pins, and locks
- Forced wrist pin oiling system for improved longevity
When a standard displacement just won't cut it, the Kb Pistons Super Duty line provides the foundation for serious power. These pistons are specifically designed for Twin Cam 96/103 engines undergoing a big bore conversion to 117 cubic inches, with a +.010 inch oversize. The 10:1 compression ratio is optimized for performance, delivering a noticeable boost in both horsepower and torque.
Engineered for High-Performance Builds
- Anodized top ring groove and crown enhance durability under extreme conditions
- Line2Line Abradable skirt coating ensures a precise, quiet fit and reduced friction
- Premium Hastings steel nitride top ring and ductile Napier second ring for superior sealing
- Forced wrist pin oiling system provides critical lubrication to the pin and bore
- Flat-top design with valve pockets to accommodate 1mm oversized valves
The Core of a Dominant V-Twin Engine
These Super Duty pistons are a vital upgrade for riders committed to building a high-output Twin Cam. Designed to withstand the demands of increased displacement and compression, they are perfect for performance baggers, custom builds, or any V-twin chasing maximum power. Always ensure professional installation and a comprehensive dyno tune to get the most out of your engine upgrade.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB662LCA.010
- UPC: 800745248077
- Compression Ratio: 10:1
- Bore Size: Big Bore TC 96/103 to 117 cu in
- Compression Height: 1.083 in
- Displacement Range: 96 to 117 cubic inches
- Quantity: Pair (2 pistons)
- Weight: 2.5 lbs
- Country of Origin: Mexico
Common questions
What displacement are these pistons designed for?
These pistons are designed for Twin Cam 96/103 engines that are being bored and stroked to a 117 cubic inch displacement, with a +.010 inch oversize.
Do I need to bore my cylinders for these pistons?
Yes, these +.010 oversized pistons require your Twin Cam cylinders to be bored to the appropriate size for a 117 cubic inch big bore conversion.
What is included with this piston set?
Each pair of Kb Pistons Super Duty pistons comes complete with premium Hastings rings, wrist pins, and round wire wrist pin locks, ready for 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 | 824-01821 |
| WEIGHT | 2.5 lb |
| 10 | 1 Compression |
