Is there any difference between the stock downpipes? I would like to go Stage 2 on my A3 but I'm in MA and so I would never pass emissions with an aftermarket downpipe. Trying to see if there is another option.
2015 S3 with 210,000 miles with new 2019 Q5 motor. Still going!
2011 Audi A4 Avant Prestige S-Line : Motoza ECU+TCU Stage 1, 4M Q7 6-piston with SQ5 rotors, C7 S6 rear brakes
2001 Corvette (C5) Z06
Past: 2015 A3 2.0T, 2001.5 S4 Avant 6mt , 2004 A4 USP 6mt , 1998.5 A4 1.8TM , 2001.5 A4 1.8TQM [gone and missed]
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