Recently I had X-Force Secondary Decat pipes installed into RXM. The stock RS performance exhaust comes with catalytic converters in the downpipe off the turbo and then again secondary catalytic converters in the mid pipes further along the exhaust system. Fitting straight pipes with no catalytic converters can improve exhaust flow. And not going to lie, it also sounds so much better and certainly creates more backfires in the exhaust.

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2016 Audi RS3 Sportsback

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