KPMI Exhaust Valve Seat 1.417" x 1.023" x 0.354" - Harley Milwaukee-Eight Touring & Softail
About KPMI
Kibblewhite Precision Machining supplies valves, valve springs, guides and complete top-end kits used by professional V-twin engine builders. Its black diamond valves and spring kits are a standard specification on high-lift cam builds.
This KPMI exhaust valve seat is crafted from Kibblewhite's proprietary material, engineered to prevent microwelding and seat recession. It's a critical component for maintaining a reliable seal under the high demands of a performance V-twin.
Why riders pick this
- Resists microwelding and valve face recession
- Compatible with diverse fuel blends
- Excellent thermal characteristics for stability
- Generous radius leading edge for easier installation
When you're pushing your Harley-Davidson, every component needs to perform. This KPMI exhaust valve seat ensures consistent sealing and durability in high-heat environments. Its advanced composition is compatible with a wide range of fuels, from standard unleaded to methanol and ethanol blends, making it suitable for various tuning and riding styles.
Enhanced Durability for V-Twin Engines
- Kibblewhite proprietary material resists microwelding and valve face recession
- Compatible with leaded, unleaded, methanol, and ethanol fuel blends
- Provides excellent thermal characteristics for stable operation
- Generous radius leading edge simplifies the installation process
Reliable Performance for Any Ride
A quality valve seat is foundational to a healthy engine, especially in performance applications. This KPMI seat is built to handle the rigors of spirited riding and high-output builds, helping to maintain compression and extend the life of your cylinder heads. Invest in components that support your V-twin's full potential.
Specifications
- Brand: KPMI
- Manufacturer Part #: 10-HC360S
- Seat OD: 1.417 in
- Seat ID: 1.023 in
- Height: 0.354 in
- Weight: 0.25 lbs
Common questions
What fuels is this seat compatible with?
This KPMI valve seat works with leaded, unleaded, methanol, and ethanol fuel blends without degradation, making it versatile for various engine setups.
Will this seat resist recession over time?
Yes, Kibblewhite's proprietary material is engineered to resist microwelding, a primary cause of valve seat and face recession, for long-term durability.
Does the leading edge design help during installation?
Yes, the generous radius on the leading edge is designed to ease insertion and seating of the valve seat, simplifying the installation process.
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 | KPMI |
| TYPE | Exhaust |
| SKU | 191-57101 |
| WEIGHT | 0.25 lb |
