You can try noyz boyz, they did some custom work on my m5, they aren't cheap but they did a good job and the sound is incredible. They are in scarborough
www.enthusiastauto.caNeed a car???
--'00 BMW ///M5 .:Jet BLK/BLK:.Individual-Style 65 Wheels; 9.5" Square Set up;275 Tires;Spacers;Black Kidneys;Muffler Delete; 3.5" Dual Tips; Beast Power; "Dinan" Ducts; E60 SSK; BC Coils
--'07 BMW M5/6.:Indianapolis Red
'88 BMW 635CSi
'81 MB 500 SEC Koenig