? about 5.3L heads?
07-22-2003, 09:50 AM
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? about 5.3L heads? If used unported with stock valves is there an increase in performance over stock LS1 heads due to the increased compression, or does the less flow out weigh the increase?
What do the stock 5.3L heads flow?
What do the stock 5.3L heads flow?
