ok car was in the shop getting new injectors,egr delete ,fuel pumpand fuel rails,had a 75mm mass air meter and resistor was bad.the shop put on a stock meter tb is 65mm would this cause a bottol neck effect. and would anyone know where to just get the electrical part of meter??
It would only be a bottle neck if the air flow needs of the rest of the engine were fairly high.
You can get the MAS sensors from any local parts store. If you are using an aftermarket meter MAS selection can be a little tricky. Just be sure you are directly replacing the part you had.