gsr tune?

[bpoweredhatch]

gsr tune?
i got my car tune at mainstream an i was wondering if i cut my exhaust off will it mess up my tune. i have a three in down pipe going into a 2.5 all the way back. if its gonna make it slower by cutting it off at the down pipe i ll just leave it alone. the only reason i wanna cut is the muffler broke and the exhaust to way to small for my setup

[scttydb411]

if it's just the exhaust it won't affect it enough to make any difference. if you were to run open downpipe it'll lean it out quite a bit and flow more.