KPMI Black Diamond Exhaust Valve - Harley Twin Cam 88-103
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.
The KPMI Black Diamond exhaust valve for Harley Twin Cam 88-103 engines is engineered for riders who demand maximum durability and performance from their V-twin. This valve is a direct replacement, designed to withstand the rigors of high-performance riding.
Why riders pick this
- German Black Diamond impregnation for deep hardening
- Superior wear resistance and reduced friction
- One-piece forged stainless steel construction
- Optimized flow profile for enhanced performance
- Better corrosion resistance than chrome or nickel
When you're pushing your Twin Cam, stock valves can be a weak link. KPMI Black Diamond exhaust valves are built to handle increased heat and stress, ensuring your engine breathes efficiently and reliably. The advanced Black Diamond treatment isn't just a coating; it's a deep hardening process that protects your valve train.
Engineered for Extreme Durability
- Proprietary German Black Diamond impregnation process for deep surface hardening
- Superior wear resistance and reduced friction compared to chrome or nickel plating
- One-piece forged stainless steel construction for enhanced strength
- Optimized flow profile to improve exhaust gas scavenging
- Resists corrosion for long-term performance in harsh environments
The Foundation of a Stronger Engine
Installing KPMI Black Diamond valves is a critical step in building a robust engine, whether you're performing a cam swap or a full top-end overhaul. These valves provide a reliable foundation, allowing you to extract more power and extend the life of your Twin Cam. Always confirm fitment for your specific model year before ordering.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-20325
- Length: 4.85 in
- Width: 3.7 in
- Height: 1.55 in
- Weight: 0.16 lbs
Common questions
Will this exhaust valve fit my Twin Cam engine?
This KPMI Black Diamond exhaust valve is designed to fit Harley Twin Cam 88-103 cubic inch engines from 2005 to 2011. Please confirm your specific model year before ordering.
What makes Black Diamond valves better than chrome-plated valves?
KPMI Black Diamond valves undergo a German impregnation process that hardens the valve surface to a significant depth, providing superior wear resistance, reduced friction, and better corrosion protection than traditional chrome or nickel plating.
Do I need to replace both intake and exhaust valves at the same time?
While it's often recommended to address both for a complete top-end refresh, this specific product is an exhaust valve. You would need to purchase intake valves separately if desired.
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 | 191-17012 |
| WEIGHT | 0.16 lb |
