KPMI OEM Style Compression Releases - Twin Cam Harley & Indian V-Twin
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.
KPMI OEM Style Compression Release valves are engineered to minimize the strain on your V-twin's starter and battery during startup. By venting cylinder pressure, they facilitate easier engine cranking, especially in hot conditions. These releases are sold in pairs and feature a standard M10 x 1 thread pitch for direct installation.
Why riders pick this
- Reduces hot-start issues and starter load
- Custom-molded knobs for cool touch and easy operation
- Designed for V-twin engines with M10 x 1 threaded ports
- 5-7 Newtons closing force for high-demand use
- Sold as a pair for complete engine coverage
Designed to integrate seamlessly with your V-twin, KPMI OEM Style Compression Releases are a critical upgrade for riders looking to protect their electrical system. They prevent excessive load on your starter motor and battery by releasing cylinder pressure, ensuring smoother and more reliable starts every time. Each set includes custom-molded knobs for easy manual operation and a secure fit.
Reliable Starting Performance
- Reduces hot-start issues and extends starter life
- Features custom-molded knobs for comfortable operation
- Engineered with a 5-7 Newtons closing force for high-demand use
- M10 x 1 thread pitch for a direct fit on many V-twins
- Sold as a pair to equip your entire engine
Essential for Engine Health
Whether you're running a stock setup or a built motor, these compression releases are an essential component for maintaining engine health and ensuring dependable starts. They are particularly beneficial for higher-compression engines, where the starter motor faces increased resistance. Verify your V-twin's compression release port threading to ensure perfect compatibility.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-21260
- Thread Pitch: M10 x 1
- Quantity: 2 per pack
- Weight: 0.09 lbs
Common questions
What is the primary benefit of installing compression releases?
The main benefit is reduced strain on your starter motor and battery. By venting cylinder pressure during startup, they make it easier for your engine to turn over, especially when hot.
How many compression releases come in a pack?
These KPMI compression releases are sold as a pair, providing two units for a V-twin engine.
Will these fit my Harley-Davidson or Indian Motorcycle?
These releases fit V-twin motorcycles with M10 x 1 compression release ports. Most modern Harley-Davidson and Indian Motorcycle V-twins use this thread pitch, but we recommend verifying your current release threads before ordering.
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 | 191-27052 |
| WEIGHT | 0.09 lb |
