Wiseco Black Edition Piston Kit TC 103 CID 9.6:1 Compression - Harley Twin Cam
About Wiseco
Wiseco has forged pistons in Mentor, Ohio since 1941, supplying everything from factory race teams to big-bore street builds. Forged construction is what lets a V-twin survive higher compression and more cylinder pressure than the stock cast piston was designed for.
The Wiseco Black Edition piston kit is designed for Twin Cam 103 CID engines, delivering a robust 9.6:1 compression ratio. These pistons feature Armor X and ArmorGlide coatings to reduce wear and friction, and are engineered to work effectively with both OEM and Screamin' Eagle cylinder heads.
Why riders pick this
- Achieves 9.6:1 compression ratio for increased power
- Armor X and ArmorGlide coatings enhance durability and reduce friction
- Advanced ring package for superior sealing and oil control
- Compatible with OEM and Screamin' Eagle cylinder heads
- Designed for performance-oriented Twin Cam 103 builds
For Twin Cam 103 riders looking for a noticeable bump in power and responsiveness, the Wiseco Black Edition piston kit with a 9.6:1 compression ratio is an excellent upgrade. This higher compression ratio unlocks more potential from your engine, providing a more aggressive feel without sacrificing durability. The advanced coatings and premium ring package ensure your engine build stands up to the demands of performance riding.
Performance-Oriented Design
- Premium compression ring for an ultimate seal and improved power delivery
- Napier second ring with taper face and underhook for enhanced oil control
- 3mm oil ring design with higher tension for superior oil management
- Armor X piston coating provides significant wear reduction
- ArmorGlide skirt coating reduces friction and ensures quieter operation
- Compatible with both OEM and Screamin' Eagle cylinder heads
Unlocking Your Twin Cam's Potential
A 9.6:1 compression ratio is a sweet spot for many Twin Cam 103 performance builds, offering a significant power increase that can be further enhanced with proper cam selection and tuning. These Wiseco pistons provide the durable foundation needed to support such upgrades, ensuring reliable performance for miles to come. Always confirm your engine's specific requirements and consult with a tuner for optimal results.
Specifications
- Brand: Wiseco
- Manufacturer Part #: K2790
- Engine: Twin Cam 103 CID
- Compression Ratio: 9.6:1
- Length: 9 in
- Width: 4 in
- Height: 4 in
- Weight: 2.4 lbs
Common questions
Will these pistons work with my stock Harley cylinder head?
Yes, Wiseco designed this kit to be compatible with both OEM Harley-Davidson and Screamin' Eagle heads for the Twin Cam 103.
What compression ratio do these pistons deliver?
These pistons provide a 9.6:1 compression ratio, which is a higher compression suitable for performance builds and typically requires a proper tune.
Is a dyno tune required after installing these pistons?
Any change to engine compression or displacement will likely necessitate a professional dyno tune to optimize fuel delivery and timing for peak performance and engine longevity.
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 | Wiseco |
| TYPE | Black |
| SKU | K2790 |
| WEIGHT | 2.4 lb |
| 9.6 | 1 Compression |
