Audi B9 RS5 RedStar High Flow Catted Downpipes

Setup:
Downpipipes - Gesi 5” Catalyst with Heat Shield
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[@c8_s6]

only hfc? stock exhaust?

[@RedstarExhaustUSA]

Yes

[@bq4122]

Interested in downpipe setup for 2019 3.0t A6 but won’t sound like this? I have tune and aftermarket exhaust setup… who can I speak with?@redstarexhaustusa