ETS 3.0”, 3.5” and 4” Exhaust are for serious race vehicles. These exhausts totally replaces the cats and bolt right up to your stock or aftermarket downpipe. This takes full advantage of the 3.0”, 3.5” and 4.0” diameter piping and gets the transition even closer to the turbo for maximum horsepower capacity. Manufacturer from T304 stainless steel, ETS Exhausts are the biggest and best you can get.