Supertech Valve made in one piece forged stainless steel. Supertech Performance uses mainly SAE EV8 (UNS S63008) for the Intake and Exhaust valve.

Supertech Performance apply's different heat treatments to this material to obtain different hardness and ductility in accordance to application and budget (Street Performance or Heavy Duty Racing).

Black Nitrate Intake Valves Specs:

• Head Diam: 35mm
• Material: Stainless Steel 21-4N
• Groove Type: Single Groove
• Length: 117.25mm
• Stem Diam: 5.48mm

Sodium Filled Exhaust Valve Specs:

• Head Diam: 29mm
• Material: Inconel-Nimonic / Sodium Filled
• Groove Type: Single Groove
• Length: 114.7mm
• Stem Diam: 5.47mm

Sold as a 16pc set (8 intake / 8 exhaust valves)