They're finally here! Introducing our new resonated downpipes for the 4M Q7 equipped with the 3.0T supercharged engine. These are the first aftermarket downpipes available and solve the dreaded rattling flex pipe issue in the Q7 while improving performance and longevity. Our high-flow downpipes are built completely with T304 stainless steel for high strength, corrosion resistance, and longevity. These downpipes remove the small front resonators (sometimes mistaken for secondary cats), allowing your engine to breathe through larger 2.5" piping and smooth transitions. Expect power gains as high as 12hp (depending on tuning and hardware) without adding noise or rasp!   Features: Slightly deeper sound Increased engine response Power increase of 8-10hp on an otherwise stock vehicle Full 2.5" (62.5mm) diameter, terminating at 60mm sleeve clamp fittings to ensure perfect fitment with the OEM exhaust system V-band connections for strength & adjustability Full T304 stainless steel construction Hand TIG-welded and back-purged  Internally reinforced flex joints for durability and failure prevention No check engine light, emissions systems are untouched Works well with both tuned and factory cars - a great replacement option for your rattling stock downpipes   Includes: GAS 2.5" Downpipe Set OEM downpipe gaskets Full 10.9 hardware set Sleeve clamps are not included   Fitment: 2016-2019 Audi Q7 3.0T EA837 Supercharged Not compatible with 2020+ Q7 3.0T EA839 Turbocharged engines