Supertech Black Nitride Exhaust Valve - +1mm Oversize - Set of 8 | 1989-1995 BMW 318i (BMEVN-1031S-8)

BMW M42/S42 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. Some applications call for us to harden certain areas such as the tips and or the seats. For these applications we will often times weld other hard metal alloys to the valve for increased durability.

Features

• Head Diam: 31.50mm
• Material: Black Nitride
• Groove Type: Single Groove
• Length: 105.65mm
• Stem Diam: 5.95mm
• Size: 1mm+
• 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

• 1989–1991 BMW E30 318is
• 1990–1992 BMW E30 318i
• 1992–1995 BMW E36 318i
• 1991–1995 BMW E36 318is
• 1994–1995 BMW E36 318ti

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.