Think I am going to replace the crazy loud exhaust on my 01 GTS, currently has headers, no cats, single muffler Bellanger system, loud as shit. I am going to go with a Corsa and try it without cats first, my question is if I add cats back into the system will I need to make any changes to the SCT tune?? I'm guessing not, looking for another opinion.
Corsa installed, huge difference from Belanger. Nice and quiet when cruising, angry when full throttle, I love it. Also threw in an Ipsco short shifter while I was at it. Both mods completely change the car from what it was.
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