Brings ramair from 4" Z3 or Z3M Ramair vent to engine room, just add hose in between. Fits all Z3 models from 1.8 to all Z3M Models when using cone filter, or aftermarket carbon fiber airboxes. Very notable Ramair Effect at speeds. Must for 2.8 - M models. More torque and power through rev range from idle in engines that are tuned.
