KPMI Intake Valve Seat 1.752" x 1.417" 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 intake valve seat, sized at 1.752" x 1.417" x 0.354", is crafted from Kibblewhite's proprietary material. It's engineered to resist microwelding and seat recession, which are common issues in high-performance Harley-Davidson engines.
Why riders pick this
- Proprietary material resists microwelding and recession
- Compatible with diverse fuel blends
- Excellent thermal characteristics for stability
- Generous leading-edge radius for easier installation
When building or rebuilding a Milwaukee-Eight engine, every detail matters for optimal performance and longevity. This KPMI intake valve seat is designed to provide a durable and stable sealing surface, even under the stress of high-RPM operation and elevated temperatures. Its compatibility with leaded, unleaded, methanol, and ethanol fuel blends ensures reliable performance across a wide spectrum of street and race applications.
Enhanced Durability for Intake Valves
- Kibblewhite proprietary material resists microwelding and valve face recession
- Maintains excellent thermal characteristics for consistent engine operation
- Compatible with leaded, unleaded, methanol, and ethanol fuel blends
- Generous leading-edge radius for easier and more secure installation
Foundation for a Strong Top End
A premium intake valve seat is crucial for maintaining proper compression and maximizing the efficiency of your V-twin's combustion cycle. This KPMI seat provides a robust foundation for your cylinder heads, helping to prevent premature wear and ensuring your engine performs at its best for miles to come. Pair with other KPMI valvetrain components for a comprehensive upgrade.
Specifications
- Brand: KPMI
- Manufacturer Part #: 10-HC44.50S
- Seat Size: 1.752" x 1.417" x 0.354"
- Weight: 0.25 lbs
Common questions
What fuels is this seat compatible with?
This intake valve seat is compatible with leaded, unleaded, methanol, and ethanol fuel blends, making it suitable for both street and alternative-fuel engines.
What problem does this seat solve?
The proprietary material resists microwelding and seat recession, which are common causes of valve face erosion and compression loss over time in V-twin engines.
Does the radius edge help installation?
Yes, the generous leading-edge radius eases seating during machine work and reduces the risk of damage during 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 | KPMI |
| TYPE | Exhaust |
| SKU | 191-57103 |
| WEIGHT | 0.25 lb |
