So does a 4inh tip make a difference in loudness of the sound? I want my exhaust louder ut don't want to spend a whole lot of money since I put glass packs on not too long ago(Christmas time). I have a 95 351. would it be cheaper to get a new muffler(on designed to be louder),OR buy new exhuast tips to make it louder. Or does bigger tips just serve as an apperence type thing?