THE ULTIMATE LS3 HEAD TEST-STOCK VS CNC AFTER MARKET REC-PORTS

FULL RESULTS-BIG LS3 HEAD TEST, AIRFLOW AND POWER! STOCK LS3 v PORTED STOCK v AFTER MARKET. Check out the results of our big LS3 head comparison. We ran the stock LS3 heads on a 468 stroker, the 7 others heads, including ported stock heads and CNC heads from a number of manufacturers like LPE, WCCH, Speedmaster and Mast Motorsports! How much are ported heads worh-plus 2 bonus tests-Mast single plane vs Fast LSXR and Rec port vs cath port head test!

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