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My cat. conv. truned out to be the culpret when I had low boost issues. It was nearly clogged as the PO ran low octane fuel and had a bad O2 sensor. Installed a cat bypass and went from 8 to 12 psi boost. Huge difference.
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Steve
'89 951 Alpine White/Blue, factory sport seats, Lindsey DP WG, MBC, Vitesse chips, 3 bar FPR, Evo diverter valve K&N filter, cat bypass, Koni Yellows
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