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Old 01-25-2013, 05:55 PM
protree68 protree68 is offline
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Default Re: who here races with exhaust manifolds?

i watched a stock ZL1 on the dyno it made 430 hp with manifolds we tried headers and it was a hole differant animal on the first pull it made 518 hp.i had my manifolds for my car ported by the vorteck pro.
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