I've got a Fabspeed X-pipe - Resonator and secondary cat delete. The rest of my exhaust is OEM. Not sure if mine would count as an aftermarket exhaust but I thought I'd throw it in there. It's got a nice rasp\sound to it which sounds really good on downshifts (from what I've been told)..
'12 Ducati Diavel
'06 E46 M3 (sold) | '97 325is - Dinan (sold)
'02 Z3 3.0 coupe (sold)
Past - '84 Ferrari 308 GTSI | '88 Ferrari 328 GTS | '05 Dodge Viper Copperhead Edition #180/300 | Audi S4