: 05 STS V6 Catalytic Converters

08-16-12, 11:36 PM
Anybody have any experience positive or negative with removing the stock Cats or replacing with Hi-Flows? I'm doing some exhaust work on Monday that I haven't seen anyone do yet so I hope I'm the first. Don't worry I will post pics after!! But I tried to contact MadTuner to get his thoughts about the cats & if he can trick the O2's so I don't have a check engine light but he hasn't returned the call yet.

08-17-12, 02:30 PM
I can't imagine why anyone would take the cats off any car other than for off road use. It stinks. I can tell if a car doesnt have cats just by pulling behind it from its foul smell. Don't ruin your luxury car just for the sound and unmeasurable performance.