ok i need a new maf sensor and im thinking about upgrading to the pro m. but its 243 for the 75mm. i noticed alot of the mustang gts have 75mm sensors too???? maybe they would work along with the bigger ones on the sho or thunderbird. just curious. are there any others you can think of??? what about throttle bodys???? just curious. oh and by the way i got a engine management system im looking at thats super cheap. it is fuel and ignition and comes with ignition packs but it looks ghetto as hell but i read a few reviews and it seems pretty for the price. no datalogging though thats what i want. its a sds system maybe you guys have heard of it somewhere.