I am shopping for exhausts now so will let you know if I get one (won't have room to keep the stocker.) Any reason why you want to have a stock one around if you like your current setup?
08 E90 | Jet Black / Black | 6MT
Mods: RAC RG63 w/ Pirelli Corsa 255F/285R | Akrapovic Evo Exhaust | OEM Blacklines
Winter Setup: OEM 18s w/ Nokian Hakkapeliita R 245/40-18