KPMI Intake Valve Guide +0.003 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 specifically designed for Harley Evolution Big Twin and Sportster engines, featuring a robust cast iron construction and a +0.003 inch oversize bore. It's a direct replacement solution for restoring crucial valve stem clearance and reducing oil blow-by in worn cylinder heads.
Why riders pick this
- Cast iron durability for demanding use
- +0.003 inch oversize for correcting worn bores
- Restores proper valve stem clearance
- Reduces oil blow-by and consumption
- Direct replacement for Harley EVO and Sportster
When rebuilding your Harley-Davidson Evolution or Sportster cylinder heads, this KPMI intake valve guide provides a reliable solution for addressing wear. Made from durable cast iron, it's built to perform under the stresses of a V-twin engine. The +0.003 inch oversize bore is precision-engineered to accommodate cylinder head bores that have expanded due to wear, ensuring a proper press fit and restoring the critical relationship between the valve stem and guide.
Reliable Performance for Your Harley
- Durable cast iron construction for dependable service
- +0.003 inch oversize bore to correct worn guide passages
- Restores precise valve stem-to-guide clearance
- Helps reduce oil consumption and improve engine sealing
- Direct replacement for original intake valve guides
Essential for a Solid Top End
Addressing worn valve guides is paramount for maintaining a healthy top end on your Harley. This KPMI intake guide helps ensure consistent valve operation and prevents common issues associated with excessive valve stem play. For the best outcome, proper installation by a qualified technician, including reaming to the correct final dimension, is highly recommended to achieve optimal performance and longevity from your Evolution or Sportster engine.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-2123C
- Length: 1 in
- Width: 3.55 in
- Height: 0.85 in
- Weight: 0.07 lbs
Common questions
What does the +0.003 inch oversize mean for this valve guide?
The +0.003 inch oversize indicates that the outer diameter of the guide is 0.003 inches larger than the factory standard. This is used to achieve a tight press fit in cylinder head bores that have become enlarged due to wear.
Is this valve guide intended for intake or exhaust applications?
This KPMI part is an intake valve guide. Exhaust valve guides have different specifications and require a separate part number.
Will this guide 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 utilize different cylinder head designs and require alternative valve guides.
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 | 191-57054C |
| WEIGHT | 0.07 lb |
