Exhaust Valve (Inconel / 31.5mm - 1mm Over) These valves are 1MM larger than stock, great for ported street heads that don't need the huge 2.5mm oversized valves. These Inconel valves are lighter than the stock steel valves and are extremely heat...

Exhaust Valve (Inconel / 32.5mm - +2mm) These race valves are the highest level of sophistication in valve technology. Extremely heat resistant, and designed for use in racing engines that are subjected to extreme exhaust temperatures such as turbo,...