yamaha537

I got a 89 gt 5.0. its got the mac long tubes and mac h pipe. i was told it has flowmasters but im pretty sure that all flowmasters are stampped right? these dont have any markings. anyways i dont think the car is as loud as it should be. I dont know if i should try and put diffrent mufflers on it or what. for being that 'free' it should be pushin some fumes. what do you guys think. just leave it the way it is or mess with it and see what i can do. i also want to take into consideration loosing back pressure.

Vertastang

my Flowmasters dont have anymarkins on them so they might be Flows. take a pic and post it on here we can usally tell by what they look like.

Boss_Hotrod

On mine one is stamped facing the ground and the other is stamped facing the floorboard. Guess they justed flipped them over.