Upgrade your 11-13 BMW (N55B30 motor) 335i,135i,335ix, catless down pipes. The first chamber is 4". Please note E92 335i Coupe,
E90 335i/335ix 2011-13 BMW E82 135i Coupe, E88 135i convertible N55 Single Turbo cars (Pre F chassis) this is for the SINGLE TURBO
cars. 2011-13 BMW .
E90 335i/335ix 2011-13 BMW E82 135i Coupe, E88 135i convertible N55 Single Turbo cars (Pre F chassis) this is for the SINGLE TURBO
cars. 2011-13 BMW .