KPMI +0.001 Bronze Exhaust Valve Guide - 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.
When your cylinder head bores show wear, a standard guide won't cut it. This KPMI +0.001 oversized bronze exhaust valve guide is designed for Harley Evolution Big Twin and Sportster engines that require a precision fit after bore wear. It's crucial for restoring proper valve stem clearance and valvetrain stability.
Why riders pick this
- Bronze construction for durability
- +0.001 inch oversized for worn bores
- Restores precise valve stem clearance
- OEM replacement specification
- Fits Evolution Big Twin and Sportster
Addressing cylinder head wear during a rebuild is paramount for engine health. This KPMI exhaust valve guide, precision-machined to +0.001 inch oversized, offers a tighter fit in bores that have experienced slight wear. Crafted from durable bronze, it provides excellent wear characteristics and heat management, ensuring your exhaust valves operate smoothly and seal correctly.
Precision Fit for Worn Bores
- Bronze construction for superior wear resistance and heat dissipation
- +0.001 inch oversized diameter for a precise fit in worn cylinder head bores
- Maintains optimal valve stem-to-guide clearance
- Direct OEM-specification replacement for Evolution and Sportster engines
Reclaim Your Top-End Performance
Installing oversized valve guides is a common practice in engine rebuilding when cylinder head bores are no longer within factory tolerance for standard guides. This KPMI bronze guide allows you to restore critical valvetrain specifications without replacing the entire cylinder head. Professional machine shop installation is strongly recommended to ensure accurate reaming and pressing for a perfect fit, ensuring your Harley's top-end performs flawlessly.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-2131
- Position: Exhaust
- Length: 0.85 in
- Width: 3.6 in
- Height: 0.7 in
- Weight: 0.09 lbs
Common questions
What does +0.001 oversized mean for this valve guide?
The +0.001 oversized specification means this valve guide has a diameter 0.001 inches larger than a standard guide. It's intended for cylinder head bores that have experienced wear and require a slightly larger guide for a proper press fit.
Is this valve guide a direct replacement for the original?
Yes, it meets OEM specifications for Evolution Big Twin (1984-1999) and Sportster (1986-2003) engines, but its oversized dimension is specifically for heads with worn bores, ensuring a tight, correct fit.
Will this fit my 2004 or newer Sportster?
No, this KPMI valve guide is designed for Evolution Big Twin and Sportster models up to 2003. It is not compatible with 2004 and newer Sportster engines due to 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 | 191-57030 |
| WEIGHT | 0.09 lb |
