Quote:
Originally Posted by eaglektd
BMS sells two products which have the ability to keep your car from throwing codes when you have catless or race downpipes installed. One is a subfunction of the JB4 tune, the other is called a "downpipe fix." When you go for emissions where they plug into your OBDII your monitors will say they are "ready" and you're good to go even though you are driving a smog machine.
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Is there a difference between catless and race downpipes? Which is better for street use? Anyways, as said before. I don't have to go through emissions so I'm not worried about that. As long as it doesn't throw an engine code or CEL then I could care less about emissions.