CHEVROLET PERFORMANCE CYLINDER HEAD – LS3 – CNC PORTED – SOLD INDIVIDUALLY – 88958758
These Chevrolet Performance Parts CNC-ported LS3 cylinder heads flow more than 350 cfm at 0.600 in. lift (intake side) at 28 in. of water restriction, or nearly 10 percent more than the stock casting. This promotes greater power across the rpm band and maximizes the advantage of additional performance parts, such as a larger camshaft and high-flow intake manifold. They feature 276cc intake runners and 92cc exhaust ports, along with a combustion chamber volume of 68cc. That’s the same volume as stock LS3 cylinder heads, which maintain the stock compression ratio. The cylinder heads will fit any LS engine with cylinder bores of 4.000 in. or larger. The Chevrolet Performance Parts CNC-Ported LS3 cylinder heads are delivered fully assembled, with 2.165 in. hollow stem intake valves and 1.59 in. solid stem exhaust valves, as well as valve springs, valve locks, spring retainers, and valve stem seals.