The ATP lower 3" downpipe long version deletes the rear cat and bolts to Genesis Turbo front cat (or ATP 3" cat delete pipe). Made of high quality stainless steel. Direct bolt up and replaces the restrictive stock downpipe after the first cat and also deletes the restrictive factory rear cat. Allows you to run into a 3" exhaust for a true 3" system. Designed to support up to 500 HP.