Sorry, duplicate post.
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http://www.svtperformance.com/forum...body-know-how-restrictive-stock-mufflers.htmlI'm hoping for 625 to 650 through stock mufflers n such
I think it's doable
I ran a 10.87 @ 128.7 with the stock 3.73 gears I had to shift into 5th a few hundred feet from the line. I plan on switching to 3.31 or 3.55 this spring.
12 Boss Paxton 3.6 pully just over 8psi cat delete and borla mufflers
Runs like stock on the street (out of boost ofcourse)