Brian Crower BC3927 6.6mm Exhaust Valve Guides For Nissan VQ35DE

6.6mm Exhaust Valve Guides For Nissan VQ35DE

BC valves are made from one piece forgings, where the head of the valve is forged under a two step process to keep a consistent material grain flow. Intakes are made from EV8 (21-4N) steel. This is the highest grade of steel available and provides the strength to withstand just about any application. BC exhaust valves are made from EV16 (21-8N) or EV8-Nb/w for greater strength at higher temperatures. All BC valves are chrome coated for a polished finish, hardened to 52Rc and capable of withstanding temperatures in excess of 1400F.