I have a dyno book and it shows like an 8 hp or so gain at the wheels, but at like 5300 or 5500 rpm and the gains (not really gains, less loss) are higher as you rev so like 4 rwhp at 3000 rpm and so on.
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1993 Mustang GT - March Ram Air & Pullies, K&N, C&L 73mm MAF, 3.73 Gears, Super Competition Hooker Headers, 2 1/2 in. High Flow H-Pipe & Cat Back, Pro 5.0 Shifter, 16* Timing Advance, 8.5mm MSD Plug Wires
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