I run mac long tubes with high flow cats and my car fast passed. It suprised me considering my car is far from stock with an non emission cam, ported heads, intake, vortech s trim pullied for 12 psi and 38# inj. I was very pleased to say the least! Sorry to hear about your troubles. Maybe its in the tune.
Tom
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Vortech Supercharged 89 LX
Best run on dunlop radials 11.58 @ 126.5 mph!
Best run on hoosier quick times 11.15 @ 128mph!
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