I still have these xi downpipes for sale if anyone wants them... I'll take $600 shipped in the 48 states!
Application : 335xi N54... new $927.95
2009 Z4 35i 6mt, Spec 3+ clutch, Mfactory SMFW, MHD E40 tune, AR downpipes, Custom turbo Inlets, BG intercooler, Stett Chargepipe, Tial BOV, H&R coils, 19" 2-piece wheels, Potenza RE-11 tires
Sold > 2008 E92 335xi FBO and more, ran 11.988 @ 114.080 MPH on all season tires...