Edelbrock 8- BBC Perf RPM Exhaust Valves 1 880 X 5 450

1-piece, swirl-polished, hardened tip stainless steel exhaust valves with undercut stems for increased flow. Hard-chromed valve stems are 11/32in. except where noted The Edelbrock #9776 Exhaust Valve is a 1.88" 1-piece, swirl-polished, hardened tip stainless steel valve with undercut stems for increased flow. Fits Edelbrock #60459, #60479, #60499, #60559 & #60439 Cylinder Heads Edelbrock part #182052 is a state-of-the-art Electric Fuel Pump offering maximum performance in a compact package. Chevrolet:Big-Block Mark IV:396 (6.5L)-502 (8.2L)