Gm Performance Parts L92 Cylinder Heads

Basic specs on the L92 combustion chamber are as follows: the chamber volume is 68.4cc, and it uses a honkin' 2.165-inch intake and a 1.590-inch exhaust valve. As such, don't even think about bolting one of these suckers to an LS1 or LS6: it'll need at least a 4-inch bore to work. (And though we've been assured that stock piston valve reliefs will work just fine with these heads, we can't promise the large valves of the L92 will work with every possible aftermarket piston: if that's your route, proceed with some caution.)

GM Performance Parts - L92 Cylinder Heads - Wonder Head

Basic specs on the L92 combustion chamber are as follows: the chamber volume is 68.4cc, and it uses a honkin' 2.165-inch intake and a 1.590-inch exhaust valve. As such, don't even think about bolting one of these suckers to an LS1 or LS6: it'll need at least a 4-inch bore to work. (And though we've been assured that stock piston valve reliefs will work just fine with these heads, we can't promise the large valves of the L92 will work with every possible aftermarket piston: if that's your route, proceed with some caution.) View Related Article

Gm Performance Parts L92 Cylinder Heads

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