I have tanabe racing medalion exhaust that didnt come with baffle silencer, which i have determined i really need. Im just gonna buy one, *unless someone has one they want to get rid of*. I know the tip is 100mm so I need a silencer w/ 100mm tip, but they come with a second measurement of either 50mm or 38mm. I know the pipe diameter on the exhaust is 60mm so I dont get the different diameters on the baffle. Do I want a 50mm or a 38mm for my 60mm exhaust pipe? Is there a functional difference or was one specifically suposed to come with the exhaust? BTW this is on a GSR.