KPMI +0.004 Cast Iron Exhaust Valve Guide - Harley Panhead & Shovelhead
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 cast iron exhaust valve guide is designed for Harley Panhead and Shovelhead engines, featuring a +0.004 inch oversize bore. It's a direct replacement part, crucial for restoring proper valve-to-seat clearance in cylinder heads with significant wear.
Why riders pick this
- Cast iron for robust and lasting performance
- +0.004 inch oversize for worn valve stems
- Direct fit for Panhead and Shovelhead cylinder heads
- Restores proper valve-to-seat clearance
When rebuilding the top end of your Panhead or Shovelhead, ensuring correct valve guide dimensions is paramount for engine health and performance. This KPMI cast iron exhaust valve guide, with its +0.004 inch oversize, is specifically engineered to address heavily worn cylinder head bores. It allows you to restore critical valve stem clearance and seating without necessarily requiring additional cylinder head boring, providing a precise fit for matching oversize valves.
Engineered for Precision and Durability
- Robust cast iron construction for long-term wear resistance
- +0.004 inch oversize to accommodate worn valve stems
- Direct replacement fit for Panhead and Shovelhead engines
- Helps restore proper valve-to-seat clearance
Critical for a Strong Top End
Accurate valve guide fitment is a cornerstone of a reliable V-twin engine. This KPMI +0.004 oversize exhaust guide is an essential component for maintaining valve stability, reducing oil consumption, and ensuring optimal compression. Choosing the correct oversize guide for your Panhead or Shovelhead rebuild means investing in the longevity and performance of your classic Harley-Davidson powerplant.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-2034C
- Material: Cast iron
- Oversize Specification: +0.004 in
- Length: 0.85 in
- Weight: 0.07 lbs
Common questions
Is this an intake or exhaust valve guide?
This KPMI part is an exhaust valve guide. For intake valve applications, you will need to order the specific intake guide part number separately.
What does +0.004 inch oversize mean for this valve guide?
The bore of this guide is 0.004 inches larger than stock. It is designed to accommodate worn valve stems or to be used with matching +0.004 oversize valves, helping to restore proper clearance.
Will this valve guide fit my 1978 or newer Shovelhead?
No, this KPMI valve guide is specifically designed for Harley-Davidson Panhead engines (1948-1965) and earlier Shovelhead engines (1966-1977). It is not compatible with later model Shovelheads.
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 | 191-57021C |
| WEIGHT | 0.07 lb |
