Kb Pistons Super Duty 10:1 Flat-Top Piston Set - Harley Twin Cam 96 to 103 +.010 Overbore
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.
Boost the performance of your Twin Cam 96 to 103 engine with the Kb Pistons Super Duty Piston Set. These 10:1 compression ratio, +.010 overbore pistons are engineered for maximum power and a precise fit in your Harley-Davidson.
Why riders pick this
- Designed for Twin Cam 96 to 103 engines
- 10:1 compression ratio for increased power
- +.010 overbore for rebuilds and displacement increase
- Anodized top ring groove and crown for durability
- Line2Line abradable skirt coating for precise fit
For riders looking to get more out of their Twin Cam 96 or 103 engine, the Kb Pistons Super Duty Piston Set offers a significant upgrade. Designed for a 10:1 compression ratio and a +.010 overbore, these pistons are ideal for maximizing displacement and restoring cylinder integrity during a rebuild. Each piston features advanced coatings and construction to ensure tight running clearances and quiet operation, critical for a performance V-twin.
Engineered for Twin Cam Power
- Anodized top ring groove and crown for superior durability
- Line2Line abradable skirt coating ensures a self-honing, precise fit
- Premium Hastings ring package for optimal sealing and long service life
- Forced wrist pin oiling for enhanced lubrication and reliability
- Flat-top 1.2cc design with 1.083" compression height
Uncork Your V-Twin
These Super Duty pistons are a direct upgrade for your big-bore Twin Cam engine, offering improved strength and efficiency. They come as a complete pair, including all rings, wrist pins, and locks, making installation straightforward. Pair them with a performance cam and a dyno tune to truly unleash the power in your Harley-Davidson Touring or Softail, ensuring it performs as aggressively as it looks.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB660LCA.010
- UPC: 800745243355
- Engine Size: 96–103cc (big-bore)
- Compression Ratio: 10:1
- Piston Top: Flat-top, 1.2cc
- Compression Height: 1.083"
- Quantity: Pair (2 pistons)
- Weight: 2.5 lbs
- Country of Origin: Mexico
Common questions
What compression ratio and overbore are these pistons?
These Kb Pistons Super Duty pistons are designed for a 10:1 compression ratio and feature a +.010 overbore for Twin Cam 96 to 103 cubic inch engines.
Are rings and pins included with the pistons?
Yes, this piston set comes as a complete pair, including premium Hastings rings, wrist pins, and locks for a straightforward installation.
Will these pistons work with my stock cylinders?
No, since these are +.010 overbore pistons, your cylinders will need to be bored out to the appropriate size to ensure proper fitment. Always confirm with your engine builder.
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 | 824-01811 |
| WEIGHT | 2.5 lb |
| 10 | 1 Compression |
