SLP Loud Mouth Exhaust 2004 GTO

SLP Loud Mouth Exhaust 2004 GTO

Item Code: GT5004

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Ships 3-5 business days after you order.


Product Description

Looking for the ultimate GTO cat-back system? SLP has a great options for your 2004 GTO.

SLP's GTO Loud Mouth exhaust system employs an integral X-pipe crossover and specially designed "Shotgun" race resonators to provide superior flow and performance, while minimizing interior drone. The resulting tone is deep, rich, and powerful--the consummate fusion of muscle-car aggression and grand-touring civility. The GTO Loud Mouth is hand-built from 100 percent stainless steel and carries a limited lifetime warranty.


  • Constructed entirely from mandrel-bent 304 stainless steel (2.5" OD)
  • Equipped with an integral X-pipe crossover for optimum performance and sound quality
  • Custom-designed "Shotgun" race resonators provide virtually unrestricted exhaust flow
  • Exclusive modular design allows easy interchangeability between resonators and/or mufflers
  • Features two hand-polished, double-wall tips
  • Designed to OEM standards of fit and durability
  • Covered by SLP's limited lifetime warranty
  • Priced significantly less than competitors' stainless systems


  • 2004 Pontiac GTO

Installation Difficulty

Installation Difficulty 3


Average Customer Review 5 out of 55 out of 55 out of 55 out of 55 out of 5 () 1 Reviews
Write a review and share your thoughts with others.
5 out of 55 out of 55 out of 55 out of 55 out of 5 Excellent Cat-Back System, 5.18.2011
Reviewer: James M (Norfolk, VA)
I would definitely recommend this exhaust system to another customer. The only personal drawback in my opinion torca clamps that connect the pieces. I would definitely prefer bolt to bolt connections; so, it may be best to have it welded together after installation, but it definitely sounds throaty and adding headers with high flow cats will really open up the exhaust and sound.