If you're going to replace the converters get a 2-1/2" H-pipe from MAC or BBK with hi-flow cats - about $400. You'll be sorry if you waste money on 4 restrictive stock cats and then have to replace them anyway. Mine was a gross polluter on the first test, replace the stock h-pipe and O2 sensors and it breezed through the second time.
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86 GT, GT40P heads, Crane 2031, 1.7 RR's, Cobra intake, 65mm TB, 73mm Vortech, 24# injectors, MAC GT40P headers, 2-1/2" BBK H-pipe (w/cats), Flowmasters, 3.55s, Groundpounder subs and lower control arms, 277 RWHP.
THIS JUST IN!! All the good stuff is going in the new red 93 GT - no more rattles!
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