i have a 1996 blazer 4wd no lift and was wondering wat size tires would fit with no mods

and wat kind of exhaust system should i put on im lookin for a deep low tone lookin fo a cat back dual rear

put a flowmaster on it, I have one and it sounds great! 40 Series Flowmaster, as for the tires I have 31's right now and four wheel quite a bit and they are fine. I have a 94