KPMI Standard Cast Iron Valve Guide - Evolution Intake & Exhaust - Harley Evolution 1987-1999
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.
Ensure precise valve operation in your Harley Evolution engine with KPMI standard cast iron valve guides. These direct OEM replacements are crucial for maintaining proper valve stem clearance and reducing oil consumption. Designed for both intake and exhaust positions, they are a fundamental component for any engine refresh.
Why riders pick this
- Cast iron construction for reliable durability
- Standard size fits factory bore without machining
- Works for both intake and exhaust valves
- Direct OEM replacement for Evolution engines
- Restores proper valve sealing and reduces oil consumption
Worn valve guides can lead to inconsistent valve seating, reduced compression, and increased oil usage. KPMI cast iron valve guides are manufactured to precise factory specifications, providing a secure and stable path for your valve stems. This helps restore proper valve sealing and overall engine efficiency.
Reliable Performance and Durability
- Durable cast iron construction for dependable service
- Standard size for direct fit into factory bore without machining
- Fits both intake and exhaust valve positions in Evolution heads
- Engineered as a direct OEM replacement for 1987-1999 models
Critical for Engine Health
Replacing worn valve guides is an essential part of any Evolution engine rebuild. These KPMI guides help eliminate excessive valve stem play, which can prevent premature wear on other valvetrain components. Invest in these quality guides to keep your 1987-1999 Evolution motor performing optimally.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-4320C
- Material: Cast iron
- Length: 0.75 in
- Width: 3.55 in
- Height: 0.65 in
- Weight: 0.1 lbs
Common questions
Is this valve guide compatible with Twin Cam or Milwaukee-Eight engines?
No, this KPMI valve guide is specifically for Harley-Davidson Evolution engines from 1987-1999. Twin Cam and Milwaukee-Eight models use different valve guide designs.
Does installation of this guide require special machining of the cylinder head?
No, these are standard size guides designed to fit directly into the factory bore without the need for honing or reaming.
Can this single part number be used for both intake and exhaust valves?
Yes, this KPMI standard cast iron valve guide is designed to fit both the intake and exhaust valve positions on 1987-1999 Harley Evolution cylinder heads.
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 | Engine |
| SKU | 191-57003C |
| WEIGHT | 0.1 lb |
