ok, soo i got a stock first gen b16. with a t3/to4 garret turbo. im going with a chipped p28 ecu. soo i know had to buy a new distributer, the actual p28 ecu, obd0 to obd1 harness. a map sensor which he says cost 150$, a seperate chip for the ecu thats 150$ i know about the map sensor but can anyone tell me what they think the other chip for the ecu is for and can i get it cheaper. like hes over priced the obd0 to obd1 harness i can get it for a 100 off ebay hes telling me 250. and i can get a obd1 distributer for a 100 and he says 200. i cant get away from the tuning cost which is 300 but im trying to see if i can get as much shit bought my self, soo i know hes not tryin to take extra money from me. any info would really help.