KIBBLEWHITE Exhaust Valve - Evolution 20-4170

If you're running a high-revving engine, valve wear is one of the quickest ways to lose performance and reliability. The KIBBLEWHITE Evolution 20-4170 exhaust valve eliminates that risk with a nitrided, stellite-tipped design that outlasts conventional valves while maintaining superior flow characteristics. Whether you're pushing a naturally aspirated or forced-induction build, this one-piece stainless-steel valve delivers the durability and precision you need to keep your engine running strong.

• One-piece stainless steel
• Stellite-tipped design
• Nitrided surface (.002" depth)
• Superior corrosion resistance
• Reduced friction profile
• Excellent flow characteristics
• Leaded/unleaded compatible
• Works with cast iron guides
• Works with bronze guides
• Close-tolerance fitment
• Maximum oil control
• Enhanced heat dissipation
• Made in U.S.A.