Hey i recently bought a 95 z28.Turns out the kid b4 me decided to hollow out the catalytic converter,and it sounds so crappy,not to mention turning my bumper white.Im guna buy a universal high flow cat and have my gf's dad weld it in,but i need to know wut size inlet/outlet converter to get.The exhaust system is stock cept for 80 series muffler.I've tried looking on here but cannot find it ne where...please help!! oh its the single cat system by the way...thanks....im thinking 2.50 but in not that sure..

mike