KPMI Cast Iron +0.001 Exhaust Valve Guide - Harley Shovelhead 1978-1983
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 features a +0.001 inch oversize bore, ideal for restoring worn cylinder heads on Harley Shovelhead engines from 1978-1983. It's a direct replacement designed to address excessive valve-to-guide clearance, which can lead to oil consumption and reduced engine performance. This oversize guide is a crucial component for a proper top-end rebuild.
Why riders pick this
- For 1978-1983 Harley Shovelhead engines
- Cast iron construction for durability
- +0.001 inch oversize bore for worn heads
- Restores proper valve stem clearance
- Reduces oil burning and improves sealing
When your Shovelhead engine's cylinder heads show signs of wear, especially in the valve guide bores, an oversize guide is often the solution. This KPMI exhaust valve guide with a +0.001 inch bore allows for precise machining to achieve optimal valve stem clearance, even if your original guides are significantly worn. Restoring proper valve sealing is paramount for maintaining compression, minimizing oil burning, and ensuring your classic V-twin delivers consistent power. This cast iron guide provides the durability needed for the demands of these engines.
Precision Engineering for Worn Heads
- Durable cast iron construction for longevity
- +0.001 inch oversize bore for addressing wear
- Direct replacement for 1978-1983 Shovelhead exhaust ports
- Helps reduce oil consumption and improve compression
The Right Choice for a Quality Rebuild
Using an oversize valve guide like this KPMI component is a common practice in professional engine rebuilding when the original guide bore is too worn for a standard size. This allows your engine builder to machine the head to accommodate the new guide, ensuring a perfect fit and extending the life of your cylinder heads. It's an essential part of a comprehensive top-end overhaul, especially if you're chasing every bit of performance and reliability from your Shovelhead. Consult with your machinist to confirm the correct oversize needed for your specific application.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-2061C
- Material: Cast iron
- Length: 1.05 in
- Width: 3.55 in
- Height: 0.8 in
- Weight: 0.09 lbs
Common questions
What does +0.001 oversize mean?
The +0.001 inch oversize bore means the inner diameter of the guide is 0.001 inch larger than the standard size. This is used when the valve stem itself is slightly worn, or when the cylinder head's guide bore requires machining to restore proper fitment.
Is this for intake or exhaust applications?
This KPMI guide is specifically designed for the exhaust valve on Shovelhead engines. Intake guides are a different part number.
Will this fit my later model Harley Big Twin?
No, this valve guide is specific to Harley Shovelhead engines from 1978-1983. Later Big Twin models like Evolution or Twin Cam use different valve train components and guide designs. Always verify fitment for your specific year and model.
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 | 191-57014C |
| WEIGHT | 0.09 lb |
