Supertech Black Nitride Exhaust Valve - Set of 8 | 1989-1993 Mazda Miata (MAEVN-1100-8)

1989-1993 Mazda Miata Black Nitride Exhaust Valves by Supertech

Supertech exhaust valves are made from EV16 (21-8N) or EV8-Nb/w for greater strength at higher temperatures.

Features

• Head Diam: 26.20mm (std)
• Material: Stainless Steel 23-8N
• Groove Type: Single Groove
• Length: 105.35mm
• Stem Diam: 5.94mm
• Back-cut angle
• Undercut stem
• One piece forged valve (non-magnetic)
• Magnetic friction welded wafer, Hardened to 52 HRC min
• Black Nitride for superior hardness keeping core ductility
• “Superfinish” valve stem with a surface roughness of about 1/3 of a regular valve

Benefits

• Less Friction
• Better Flow Rates
• Better Sealing
• Improves durability and reduces carbon build up

Applications

• 1989-1993 Mazda Miata

What's In The Box?

• 8 - Exhaust Valve

Warranty

• Due to the nature of the application, these parts are sold without any express warranty or any implied warranty of merchantability, or fitness for a particular purpose.