KPMI Intake Valve Guide +0.004 Oversize Cast Iron - Harley Evolution & Sportster
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 guide is engineered for Harley Evolution Big Twin and Sportster engines, featuring a durable cast iron construction and a substantial +0.004 inch oversize bore. It's designed to address significant wear in cylinder head guide bores, restoring critical valve stem stability and sealing.
Why riders pick this
- Durable cast iron material
- +0.004 inch oversize for significant bore wear
- Restores valve stem stability
- Reduces oil consumption and blow-by
- Designed for Harley EVO and Sportster intake
When your Harley-Davidson Evolution or Sportster engine requires more than a standard replacement, this KPMI intake valve guide with a +0.004 inch oversize bore provides the solution. Crafted from robust cast iron, it's built to handle the demands of your V-twin. This larger oversize allows for a precise fit in cylinder heads that have experienced considerable wear, ensuring proper valve stem alignment and reducing unwanted oil consumption.
Rebuilding for Longevity and Performance
- Heavy-duty cast iron construction for long-term durability
- +0.004 inch oversize to correct severely worn cylinder head bores
- Restores crucial valve stem-to-guide clearance
- Helps prevent oil burning and maintains consistent valve action
- Direct replacement for original intake guides
Achieving a Solid Top End Rebuild
Correcting valve guide wear is a cornerstone of any effective top end rebuild on a Harley. This KPMI intake guide facilitates a complete and lasting repair. Due to the oversize nature, professional installation by a machinist is strongly recommended to ensure the cylinder head bore is accurately prepared and the guide is properly reamed, guaranteeing the best possible performance and reliability from your Evolution or Sportster engine.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-2124C
- Length: 1.2 in
- Width: 3.55 in
- Height: 0.65 in
- Weight: 0.07 lbs
Common questions
What does the +0.004 inch oversize indicate for this guide?
The +0.004 inch oversize means the guide's outer diameter is 0.004 inches larger than stock. This is typically selected when the cylinder head's guide bore is significantly worn and requires a larger guide for a proper press fit.
Is this valve guide for intake or exhaust applications?
This KPMI part is an intake valve guide only. Exhaust valve guides have different specifications and require a separate part number.
Will this fit my 2004 or newer Sportster?
No, this specific guide is designed for 1986-2003 Sportster models and 1984-1999 Evolution Big Twin engines. Newer Sportster models have different cylinder head designs.
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 | 191-57055C |
| WEIGHT | 0.07 lb |
