I know well what not to do, The last thing you want ot do is void that warranty, Just want to make the "hottest corolla ever" live up to its name.
Well if you face it the base model is pretty bland, just want to get those things done to turn heads...and yes get some sort of enhancement, but if it means trashing the thing and throwing $$ out the window, well no thanks, the exhaust was already painful, as the new models have a cat/muffler in one system, hence the hi flow.
Got a good kick out of it though.
don't know how much mods will actually happen, its all fun while it goes right.
Thanks