all ya got to do to make your own is get one coke can one can of spray paint preferably not black (wont bring any attention) one spacer made of wood(self fabricated out of ceder so that you get that good burning cedar smell) a little bit of jbweld and ducttape and then a box of screws and a screw gun and just a very short amount of time out of your day and you have one bad ass tip for your car. not intended to ofend anyone but yes a tip will give the exhaust a more round sound if it is resonated.gl with the tip project