bigger mas air will it help?
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do the lid, and the MAF, get a good tune and ill bet $$ you will be VERY close to 500hp..
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... What supporting mod's are you running with that? Are you saying you added a set of true duals to an otherwise stock LS1 and gained those numbers...? Do tell....
My '09 Vette as per GM only gains 6 hp, not rwhp, with the NPP exhaust which is supposed to, at least partially, bypass the muffler.
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