2005-2007 Chevrolet Cobalt SS Black Nitride Intake Valves by Supertech
Supertech intake valves are made exclusively from an enhanced versions of EV8 (21-4N) steel. This is the highest grade of steel available and provides the strength to withstand just about any application. Supertech exhaust valves are made from EV16 (21-8N) or EV8-Nb/w for greater strength at higher temperatures.
Features
- Head Diam: 35.60 (+0.5) mm
- Material: Stainless Steel 21-4N
- Groove Type: Single Groove
- Length: 102.05mm
- Stem Diam: 5.97mm
- Magnetic friction welded wafer, Hardened to 52 HRC min
- One piece forged valve (non-magnetic)
- Black Nitride for superior hardness keeping core ductility
- Back-cut angle
- “Superfinish” valve stem with a surface roughness of about 1/3 of a regular valve
- Undercut stem
Benefits
- Improves durability and reduces carbon build up
- Less Friction
- Better Flow Rates
- Better Sealing
