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Gm 2 5 Heads On A Ls1

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Gm 2 5 Heads On A Ls1
Texas Speed LS1 Cylinder Head Upgrade - Big Power, Small Change - Part 1
The completed PRC 220cc 5.3-liter Stage 2.5 heads in bare form are delivered with new GM valve seals and Rev 2.02-inch intake and 1.575-inch stainless valves. Compared to a stock GM LS1 casting, such as the owner's "853" heads (PN 12559853) that flow 227 and 180 cfm on the intake and exhaust respectively (as measured at 28 inches of pressure) at 0.600 lift, the PRC head flows 312 cfm on the intake and 234 on the exhaust. View Related Article
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Gm 2 5 Heads On A Ls1 Gm 2 5 Heads On A Ls1
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