Not sure which 2004 Hummer H2 Performance Exhaust Systems are right for you? We have over 7601 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"Awesome package the hardest part was getting the factory exaust off, JBA went on with no issues and with an Airaid junior intake I've a 1.5 mpg increase." —Klaus S from Twentynine Palms, CA bought a JBA Performance Exhaust for a 2004 Hummer H2.