GAS Test Pipes, Audi 3.0T SuperchargedIf you're looking for our stock location high flow cats, 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)