Description
Oversize Stainless Steel EV16 (21-4N), 35mm exhaust valve, 7mm stem necked down to 6.5mm for Hyd lifter 1.8L 8v head. Higher flow than std. valve. Black nitride treatment reduces friction improves heat dissipation and Valve guide wear. Hardened Tip and Keeper Grooves (52 HRC), (use exhaust seat 109.162) 109112
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