What they said. And clogging will be a MAJOR hinderance to power. Hell, with what you said, it already IS a major hinderance to power. Replace them with high flows. If you don't want to spend that much money, get them off of there and run a pipe of the same diameter as the in and out of the cat through the center of it so it'll be like straightpipes...but that's if you don't have to worry about emissions. Note..it'll be much louder and stinkier with this..but if you're like me..that's a good thing!
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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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