Hey guys, first time here, forum looking good.
I have a couple of questions regarding modding my 320cd m sport.
I wish to change my exhaust to a twin pipe, or quad pipe, however i have read numous complaints from people saying that when they do this, they get an awful whining noice from their inline valve, is there a particular exhaust which will be fine to replace? or do i need to have a fake twin pipe (i.e 2nd pipe is just connected underneath for show)
Also, is it possible to replace the single pipe rear m sport bumper with an M3 bumper so i am able to take advantage of the two cut outs for the twin pipes?
Thanks for any advice you can give.
P.S I hope ive posted in the correct section, please forgive me if i havent.