Description
Exhaust valves endure extreme temperatures and constant mechanical stress—compromised valves lead to lost compression, poor sealing, and accelerated engine wear. The KIBBLEWHITE 40-4192 Black Diamond™ valve delivers the durability and precision your engine demands, whether you’re tracking a performance build or maintaining a high-mileage race platform. Purpose-built from premium EV8 stainless steel with proprietary friction-reducing technology, this valve resists corrosion and wear while maintaining tight tolerances across thousands of heat cycles.
- Black Diamond™ finish
- EV8 stainless steel
- CNC machined forging
- Multi-stage process
- Low-friction design
- Superior corrosion resistance
- Made in U.S.A.
- MPN: 40-4192






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