The Trooper exhaust that we switched in was only from the headers to the catalytic converter - everything from the cat to the tailpipe stayed the same. I don't see how a transmission change would affect emissions, unless it resulted in lower MPGs?
The Trooper exhaust that we switched in was only from the headers to the catalytic converter - everything from the cat to the tailpipe stayed the same. I don't see how a transmission change would affect emissions, unless it resulted in lower MPGs?