Not sure which 2002 GMC Sierra Catalytic Converters are right for you? We have over 232 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:
"This was the final piece to my exhaust system. First I got the JBA cat back exhaust and it added performance and a nice sound. Then I got the JBA headers and I didn't notice any significant differance. So I decided to get these Magnaflow performance cats and it realy helped to let my headers flow better. Sound is deeper now and performance is great. Magnaflow was the only one to offer "perfomance cats". Huge differance from my old California cats. I highly recommend these." —Steve S from Greeley, CO bought a Magnaflow Catalytic Converters - 49 State Legal for a 2002 GMC Sierra.