I ordered a MAF sensor AC Delco Part # 508 213-4527 but it is different from the one I am replacing, it is all plastic. Does it make a difference? Is this part as good in function as AC Delco part #25008308(that I got from sticky and should have looked at before I ordered the part)? What is the difference? Will it function the same as the stock one that I am replacing? Can I just get the sensor part and not the aluminum housing?