so on audis theyre called diverter valves- ya on the rex they come stock with the same thing and theyre called bypass valves that recirculate to the intake manifold and run rich and crappy when atmospherically blown off- cool, this car is perfect for me. Anyway, on the what i bought- 2003 A4 1.8t quattro 5spd, black on black- ill have picks soon even though its nothing special.lol