Originally Posted by jannisa
Have your secondary cats deleted - easy and very very cost efficient, a great mod for the rubles - and if you don't like your exhaust tips change them with the ones from the X5 which are 90mm over your 76, or if you prefer a quad appearance try to source some aftermarket twin tips.
+1. I have exactly these mods.
Here is a video of my car to give an idea of the sound and the tips.
2012 Z4 35i DCT Black/Beige - 20" Vossen CV3, PB-Brake BBK, ///M Front Bumper, ///M Steering Wheel, Led Angel Eyes, Black Grille, Short Antenna - Tuning: JB4 Map 2, Custom Made 3" DPs & MPs, BMS Dual Intake - Desire list: 3D Design Front Lip, Meth Kit, FMIC.