I'll be interested to see how this works for you. If you can fit it in the OEM location, it will retain all the "packaging" advantages of the original, plus likely lighter weight. Possibly might gain a HP or two if the fueling can be sorted. Nice choice!
4” Disc S/C Elites are a 3.5” body diameter which tapers out to a 4” opening. They’re available in a 10” length body with a 2.00” (50.8mm) inlet diameter (ID).
This is smaller than the original, and because its the same shape all around and exhaust gasses exit at the opening around its diameter, you just rotate it until the mounting bracket lines up (may need to bend the bracket a bit, but its SS so bending is fine) to the mounting point on the frame.
Also, in case you missed it, the exhaust can be tuned to your bike, or in combination with a piggyback ECU to how you want the power curve to look. Essentially because the discs are separated by a gap, by adding more discs at the opening, you increase the size of the opening. It helps to think of each disc you add as making another hole in the exhaust, or making the current one bigger.
Have a look at their FAQ:
SuperTrapp: Resource Center
[EDIT] My thanks to
@flyboy2160 for putting me on to the Supertrapp exhaust! [/EDIT]
