adampartman

Looking to upgrade my stock 545i exhaust to a dual quad setup with Magna flow mufflers. I have an OEM M-tech rear bumper with single outlet. Any ideas other than ebay for a decent quality dual style diffuser? What are the best deals around? My car is black so carbon fiber would look cool or I can paint to match. I would like to find something in the states, but if it has to come from overseas I will have to wait. Thanks in advance!

Margal

I think eBay is the good place to but it. I am also thinking mtech with dual defusor as it looks better than M5 one. Do you have magnaflow already on? I have RPI and like the sound. Can not decide which way to go.

adampartman

If you already have the quad set installed, how does the passenger side exit the back without the proper diffuser? I do not have the exhaust done yet. I want to line up all the parts first.

tonyb635

I purchased one once from China then found a used one on this forum. During my search, there was one company listing on ebay that was produced in GA, I think Atlanta or near there. It was a bit pricey, but the quality looked good and obviously the shipping was a bit less.