It all depends on what sound you like out of it. As long as it is the same diameter. I would recommend magnaflow which uses rock wool which can stand up to 2200 degrees while most aftermarket uses fiberglass which melts at 1100 degrees. Doesn't sound bad for the fiberglass but it will shrink. and become 8x smaller and won't dampen the sound very well.
A forum community dedicated to all 7th Generation Toyota Celica owners and enthusiasts. Come join the discussion about modifications, troubleshooting, engine swaps, maintenance, and more!