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Shumby made 390 rwhp at 6 lbs with stock exhaust manifolds and stock cat's. Not sure what exhaust he had. Headers and high flow cats will cost you boost and
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A True Z Fanatic
Join Date: Jul 2009
Location: Ontario Canada
Posts: 1,660
Drives: 370 Z 7AT Sports
Rep Power: 21 ![]() |
Shumby made 390 rwhp at 6 lbs with stock exhaust manifolds and stock cat's. Not sure what exhaust he had.
Headers and high flow cats will cost you boost and RHWP.
__________________
12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.
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