2005 GTO SLP Exhaust System, "Loud Mouth", w/ PowerFlo-X Crossover Pipe, shipping is not included. Bolt on a Loud Mouth® modular catalyst-back exhaust system from SLP on your new 2005 GTO for up to 5 extra horsepower and 5 foot-pounds of torque with the aggressive musclecar rumble your LS2 deserves. The secret to the system's distinctive sound is a pair of stainless Loud Mouth resonators, stamped with the SLP logo. The additional performance comes from the free-flow design and SLP's built-in PowerFlo-X? Crossover system that borrows a power-building method used in stock car racing. The system features a pair of attractive 3.5" dual-wall stainless steel tips that look great peeking out of the GTO's rear valence. The tips have an angle cut and can angle downward in a traditional style, or rotated 90 degrees so they match the curving shape of your rear valence. The modular design gives you flexibility to change to a quieter Loud Mouth II system in minutes by purchasing a pair of bolt-in Loud Mouth II bullet-style mufflers (#31063). The exhaust system is hand-crafted from 2.5" 304 stainless steel, and is covered with SLP's Limited Lifetime Warranty. Loud Mouth catalyst-back exhaust system for 2005 GTO features: * Limited Lifetime Warranty * Aggressive musclecar rumble, louder than our Loud Mouth II system (#31561) * Modular design lets you bolt-in a pair of Loud Mouth II mufflers (#31063, not included) for a quieter system * Hand-crafted from 304 stainless * Easy bolt-on that mounts to SLP's header system or stock exhaust * Distinctive stainless tips that rotate for the look you want