Currently have a 1.8t with a 3'' catless downpipe. No cats on the exhaust at all either. I'm running the stock K03 and am looking to do an APR Stage 2+ upgrade. If I recall, Stage 2+ requires exhaust upgrade, but was wondering if I ran a cutout after the DP I could benefit from the tune, and not hurt me when the cutout is closed. Car is a 2001 Avant, do I have a k03 or k03s?
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