Quote:
Originally Posted by 2012LS3VERT
I'm sure they won't choke it off so much that you'll miss your goal, but at that power level there will probably be a pretty good bit of power left on the table, especially compared to running a 2" header with the same mods. I'd wager on 20-30 HP at peak.
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Id take that bet lol..Nascar runs 1 5/8 headers and make over 950hp.Id say at 650rwhp you MAY pick up an extra 10 with the 2 inch