I just ordered these from amazon they have them at pep boys also but stupid a$$ store only has one per store and I went to 3 stores only 1 had them and the amazon seller had 3 and I ordered 2. I'm planing on painting the matte black I they are called 3A racing I thing and they have a website U can order from I found them after I ordered. BTW amazon was cheaper. $28 each. Now time for me to wait for my 2011 335i M-Tech
good luck bro. and its dimentions are 3.25"x6.75"x9.5" and the inlet is 2.5" they also have 2.1/4" inlet. Hope this helps.
