exhaust manifolds
03-13-2006, 06:38 AM
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exhaust manifolds
anybody out there change there stock 500 hp manifolds to a performance manifold with any good results if so what make and what kind of results. thanks 32 thunder 
rick
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03-13-2006, 11:54 PM
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Re: exhaust manifolds
Just last month, on the dyno, with a HP500 with AFR heads and a Crane 741 cam, I saw a difference of 25-30 horsepower gain with CMI elbow tops vs. the stock Gil performance manifolds and tails. Also a gain of 35 ftlbs of torque across the board.
Dave
Dave
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