Supertech Performance HEVN-1001-2F Black Nitride Exhaust Valve Stainless Steel - 29mm

The Supertech Performance HEVN-1001-2F is a high-performance Black Nitride exhaust valve constructed from 23-8N stainless steel with a 29.00mm (+1.0mm oversized) head diameter, single groove, and a length of 102.50mm. Engineered for demanding racing and high-performance applications, this valve is sold individually — order the quantity your engine requires.

Manufacturing Process:

• One-piece forging with a two-step forging process for superior grain flow and structural strength
• CNC machined in multiple steps to ensure exact, repeatable dimensions
• Stress-relief heat treatment followed by specialized Black Nitride hardening for enhanced surface durability
• Precision ground finish using Supertech's proprietary Superfinishing technique for flawless surface tolerances

Black Nitride Coating:

• Microhardness exceeds 800HV minimum, surpassing the base stainless steel material while retaining ductility beneath the hardened layer
• Smoother surface finish compared to chrome-coated stems, resulting in reduced friction between stem and guide
• Preferred coating for high-revving performance and racing engines

Specifications:

• Part Number: HEVN-1001-2F
• Head Diameter: 29.00mm (+1.0mm oversize), D or F face profile
• Material: Stainless Steel 23-8N
• Groove Type: Single Groove
• Length: 102.50mm (approx. 4.035 in)
• Coating: Black Nitride
• Sold: Per Valve — order the quantity needed for your engine

Supertech Performance exhaust valves are built for engine builders who demand precision and reliability. The 23-8N stainless steel alloy provides excellent resistance to heat and oxidation, making this valve well-suited for naturally aspirated and forced induction performance builds alike.