not unless there's one SERIOUS port job in those ls6 heads and it'd have to have a bada$$ cam/tune to go with it. those are just the heads off a 02-04 c5 vette. great heads but not all that jazzy w/o some real real massaging on a c n c mill and prob have to have bigger valves too. ls2 heads flow more than these in any stock formOriginally Posted by onebadgt
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with a great tune prob put in the neighborhood of 380-410 if you get some longtubes imho![]()





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