i have a 550i and recently converted the back bumper to the mtech or m sport like people say but I'm missing the piece that covers the gap between the quad muffles some people tell me its the diffuser some say it comes like that but it looks very off and unprofficianl i bin drivin around looking at other cars with the same bumper and they all have some top of cover to fill the gap..

does anyone kno what can i do to fix this problem I've bin trying for a while and I'm still with no luck :thumbsdown: ..

your help will be realii appreciated...

thank you..

 

?????

 

Maybe a picture would help...?

 

Are you saying you have a quad tailpipe setup and have the MTech rear? If so, the stock diffuser only supports 2 pipes (driver side) and you would need a custom diffuser. Another option is to get the M5 or M5Tech rear which is made for quad pipes.