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Guys, got a CEL this morning and bank 1 cat is bad my local Indy confirmed it so my options seem to be:
1. Fix under warranty as car infleet date is May 15th, 2004
2. 200 cell cats all around
3. Cat bypass (Thank you Florida = no emmisions)
What should I do? I have FisterD's on there now.
Car is 40th AE with x51 engine.
Leaning toward bypass but few questions:
How loud is it with FisterD's & cat bypass?
Do you have to do anything to avoid CEL's?
What bypass pipe is best?
Does it really smell that bad?
if yu put on softronic flash it will ignore O2 sensors altogether. do it with bypass pipes - you`ll get nice power boost at hi revs.