eightwonder

I’m trying to figure out what are the differences between base exhaust and sport exhaust, that might have been ordered and has an U21 vin code. I know there are electronically controlled flaps.
Maybe sports exhaust is just a resonator with module and it’s plug and play (with coding for sure).
I’m looking for somebody whose car came with u21 package, so i could check by VIN the parts number for the exhaust (and therefore figure out which parts are different)

thanks in advance