If you're looking for our high flow catted test pipes, they can now be found here. ------- As many people know, tuning your supercharged 3.0T beyond just a single pulley setup can drastically shorten the life of your stock catalysts, and even cause engine damage if left alone. After installing many poor-quality, low-cost imported test pipes, we began development in 2017 of a high-quality test pipe that would last. Our test pipes (like all of our products) are manufactured from start to finish in-house in Ontario, Canada by our certified TIG welders and go through thousands of hours of torture testing on our 3.0T development vehicles. Don’t be fooled by companies offering thick, heavy alternatives. Features: Thick-wall 1.6mm T304 stainless tubing 10mm T304 stainless laser-cut flanges, welded inside and reinforced outside to prevent common flange warping/cracking 1/8” T304 stainless mounting brackets  Fully hand-TIG welded and back-purged for strength and longevity True 2.5” with 2.5” flanges, no tapering down to OEM size, eliminating the bottleneck when running aftermarket downpipes/cat-back Proven on hundreds of Stage 2+ dual pulley setups  ZERO failures to date Includes: Catless test pipe set 2x Upper gaskets 2x Lower gaskets All hardware Fitment: 2009-2016 Audi B8/B8.5 A4/S4 3.0T 2007-2017 Audi B8/B8.5 A5/S5 3.0T 2012-2018 Audi 8R Q5/SQ5 3.0T 2011-2018 Audi C7/C7.5 A6 3.0T 2010-2018 Audi C7/C7.5 A7 3.0T 2011-2018 Audi D4 A8 3.0T These test pipes will not fit the C6 A6 due to a one-piece cat/downpipe design. Please verify fitment on your application before ordering! Proper software/tuning will be required. These test pipes are for off-road/racing use only. Please consult local highway/emissions laws before removing emissions components from your vehicle. We will not be responsible for any fines or penalties resulting from the installation of test pipes on a road car.