Quote:
Originally Posted by Schnell B58
Thanks. Thinking about this too, but then I need to get the JB4 or else I'll have a CEL on. I'm a little worried about warranty issues with the JB4 and also concerned that the dealer won't take the car in trade without cats. On my last trade, they made me sign an affidavit that I hadn't tampered with the cats  |
Get a catted Downpipe. No cel, passes all emissions. BMW can't say anything.
Get the JB+ or Dinan sport, both can be taken off in the parking lot before you bring it in for service.
Or just get a ECU flash that will remove the CEL. Make sure you go with a good tuner so it doesn't throw a DME tamper code.