2004 GTO SLP Exhaust System, "Loud Mouth II" w/PowerFlo-X Crossover Pipe , shipping is not included. SLP's new GTO Loud Mouth II exhaust system employs an integral X-pipe crossover and dual low-restriction mufflers to provide superior flow and performance, while minimizing interior resonance. Expect a smoother, mellower tone than that of our Loud Mouth system, along with a subtly aggressive edge under hard acceleration. Like all SLP exhaust systems, the GTO Loud Mouth II is hand-built from 100 percent stainless steel and carries a limited lifetime warranty. NOTE: Contents may vary slightly from photo. Features * Constructed entirely from mandrel-bent 304 stainless steel (2.5" OD) * Equipped with an integral X-pipe crossover for optimum performance and sound quality * High-luster Loud Mouth II mufflers combine great looks; superior flow; and a deep, muscular tone * Exclusive modular design allows easy interchangeability between mufflers and SLP resonators * Features two hand-polished, double-wall tips * Designed to OEM standards of fit and durability * Covered by SLP's limited lifetime warranty