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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
Our fresh 5.3-liter castings come from GM with 61.15cc combustion chambers, which will yield a 10.9:1 compression ratio on a stock bore LS1. To ensure that the heads seal properly to the block, each casting receives a minimum cut of 0.005-inch on a Winona Van Norman mill, which marginally increases the compression to 11.1:1. The 5.3-liter heads are very popular with LS1 owners as their chamber size bumps compression by a full point. 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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