KPMI Black Diamond Intake Valve - Shovelhead Harley-Davidson
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.
Maximize the performance of your Harley Shovelhead engine with a KPMI Black Diamond intake valve. Crafted from high-grade stainless steel and treated with an advanced German impregnation process, this valve is built for durability and efficient airflow.
Why riders pick this
- Black Diamond stainless steel construction
- German impregnation process for deep surface hardening
- Enhanced wear resistance and reduced friction
- One-piece forging for superior strength
- Excellent flow characteristics for engine efficiency
The KPMI Black Diamond intake valve for Harley Shovelhead engines is designed to deliver reliable performance and extended life. Its stainless steel construction is enhanced by a proprietary German impregnation process, creating a hardened surface that far surpasses the wear resistance and reduced friction of standard chrome or nickel-plated valves. This means more consistent engine operation and less maintenance over the long haul.
Optimized Airflow and Durability
- Constructed from durable Black Diamond stainless steel
- Proprietary German impregnation process hardens surface to .002" depth
- Engineered for superior wear resistance and reduced friction
- One-piece forging design eliminates weak points for consistent strength
- Optimized flow characteristics contribute to improved combustion efficiency
Built for the Road Ahead
Whether you're restoring a classic Shovelhead or pushing its performance limits, this KPMI Black Diamond intake valve is a critical component for reliable engine function. Its advanced material treatment and robust design ensure it stands up to the rigors of the road. Ensure your Shovelhead breathes freely and efficiently by pairing this intake valve with KPMI's corresponding exhaust valves for a balanced valvetrain upgrade.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-4194
- Length: 3.5 in
- Width: 5.7 in
- Height: 2.05 in
- Weight: 0.18 lbs
Common questions
What is the Black Diamond process?
The Black Diamond process is a proprietary German impregnation that hardens stainless steel to a depth of .002 inches. This treatment significantly reduces friction and improves wear resistance beyond what standard chrome or nickel plating offers.
Are these intake or exhaust valves?
These are intake valves. KPMI manufactures separate part numbers for exhaust valves, which should be ordered accordingly for a complete valvetrain refresh.
Will this fit my Harley-Davidson Shovelhead engine?
This valve is engineered for Harley-Davidson Shovelhead engines. For exact model year compatibility, please confirm fitment using our Shop by Bike tool 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 | 191-17003 |
| WEIGHT | 0.18 lb |
