We deal with Ultra Auto Sound as well, the owner Syed is a BMW owner and enthusiast himself (we have his E60 M5 here doing some KW Suspension and performance tuning). He has done our E36 M3 and ZM3 full systems and custom mounting. If you are looking for something simple, even easier. He's been in the business as long as I've been alive and would trust him doing my personal car as well. Here is some contact info, just tell him the guys from Bimmersport sent you and he will give you a great deal. This goes for all of maxbimmer!
Ultra Auto Sound -
3045 Southcreek Road #44 Mississauga, ON L4X 2X7
Ontario dealer for Active Autowerke|VF-Engineering
|Brembo Brake Systems
| - Call us for the best pricing please DO NOT PM in regards to pricing
Maintenance|Performance|Tuning & Forced Induction