Here in Australia our l67's came without a MAP sensor & without a EGR valve only a MAF sensor. Im of 2 the tuners soon & ill b going Mafless, & installing a MAP sensor. T uners advice !!! Ive already replaced & relocated my IAT sensor to the front of the LIM. So any info u can giv me on your U.S. 3800 MAP set up would b great ! How many bar/ connection points / acdelco pt no / wireing schematic the lot ! Also would u keep the factory sensor or update model ? Tia....