Reviewed By Steve S (Greeley, CO) Reviewed for a 2002 GMC Sierra —4/10/2011 8:50 AM
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.