[jandref321]

Could a collapsed cat cause boost leak codes? I have aftermarket race cats in my midpipes. I hit them a couple times and don't hear any rattling. They are good quality so I can't imagine they would fail anyway, but before the guy welded them in he told me that his friend put aftermarket cats in his car and one collapsed. I have a bore scope that's long enough so I may try shoving it all the way down there through an O2 sensor hole when the engine cools down.

I also plan on re flashing the Velos tune...I'm guessing I need to uninstall the JB4 first though...such a headache.