True.... My Mustang's got no power below, say, 4000 rpms or so. Don't know whether it has factory headers or not, all I know is the guy says they're equal-length. The exhaust system is 3 in. with twin flowmasters and an X pipe.... Even with 3.73 gears in the back it's seriously lacking low end power.... But I revved it up today, and once it hit 4000 it rocketed off....I couldn't believe how high and sharp the power curve was. Damn that 3 in. system.
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'91 Mustang GT 5.0 AOD Daily Driver
Current stats: NEW 302 short block, E-303 cam (@.050, 220/220, .498/.498, 110 degrees), 1.6 roller rockers, Performer RPM heads (aluminum, 1.9/1.6, 60cc chambers), Cobra intake, Granatelli 75mm MAF, Billet AFPR, Equal-Length Shorty Headers, Off-Road X Pipe, Flowmasters, 4.10 POSI
13.73 at 103.8, ~2.2 60'
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