KPMI Cast Iron +0.001in Oversize Intake 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.
When your Panhead or Shovelhead engine's valve guide bores have experienced wear, this KPMI cast iron intake valve guide, sized at +0.001in oversize, provides a precise solution. It's designed to restore proper valve stem alignment and contribute to a reliable top end. This guide is essential for maintaining the integrity of your classic Harley-Davidson motor.
Why riders pick this
- +0.001in oversize for worn valve guide bores
- Durable cast iron construction
- Specifically for intake valve applications
- Restores proper valve stem alignment
- Fits Harley Panhead (1948-1965) and Shovelhead (1966-1977)
This KPMI cast iron intake valve guide is engineered for Harley Panhead engines (1948-1965) and Shovelhead engines (1966-1977). Its +0.001in oversize dimension is ideal for cylinder heads where the original valve guide bore has worn slightly beyond standard specification, requiring a larger replacement. Crafted from durable cast iron, this guide helps ensure consistent valve operation and prevents excessive oil consumption by maintaining a tight seal around the valve stem. It's a critical component for any performance-minded vintage Harley builder.
Restoring Critical Valve Train Function
- +0.001in oversize for worn guide bores
- Durable cast iron construction
- Specifically for intake valve positions
- Ensures proper valve stem alignment
- Fits Panhead 1948-1965 and Shovelhead 1966-1977
Precision for Your Vintage V-Twin
Installation of this oversized valve guide requires careful machining of the cylinder head to the precise +0.001in dimension. This ensures a perfect interference fit, which is paramount for valve train stability and preventing future wear. Choosing KPMI for your Panhead or Shovelhead rebuild means investing in components designed to bring your classic Harley back to optimal performance and reliability.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-2021C
- Length: 1.15 in
- Width: 3.7 in
- Height: 0.85 in
- Weight: 0.07 lbs
Common questions
What does +0.001in oversize mean for this valve guide?
The +0.001in oversize means this guide is 0.001 inches larger in diameter than a standard guide. It's intended for cylinder heads where the original guide bore has worn or has been machined to a slightly larger size.
Is this valve guide for both intake and exhaust valves?
No, this KPMI valve guide is specifically for the intake valve position. You will need to order a separate exhaust valve guide if you are replacing both.
Will this fit my Panhead or Shovelhead engine?
Yes, this +0.001in oversize intake valve guide is designed for Harley Panhead engines from 1948-1965 and Shovelhead engines from 1966-1977, assuming your cylinder head is prepared for an oversized guide.
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 | 191-57042C |
| WEIGHT | 0.07 lb |
