Supertech VW 1.8L/2.0L 8V 16V Black Nitrided Intake Valve - +0.5mm Oversize - Set of 10

Supertech intake valves are made exclusively from an enhanced version of EV8 (21-4N) steel, the highest grade of steel available, providing strength to withstand just about any application. Features: Head Diam: 32.50mm(+0.5), Material: Stainless Steel 21-4N, Groove Type: Single Groove, Length: 95.50mm, Stem Diam: 6.97mm, 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.