Not sure which 2004 GMC Sierra Exhaust Headers & Manifolds are right for you? We have over 225 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:
"THE HEADERS WERE GOOD THE HARDWARE THAT CAME WITH THEM WAS VARY CHEEP. HAND TO SPEND MORE FOR NEW BOLT AND HARDWARE WAS NOT HAPPY WITH THAT." —Thor K from Nampa, ID bought a JBA Cat4ward Headers for a 2004 GMC Sierra, 6.0L V8, without EGR.