Im getting an Edelbrock Performer intake and an Edelbrock 70mm throttle body/egr spacer. I know I want a Pro-M mass air meter but don't know which one. I need it to work with my BBK fenderwell cai. Theres 77/80mm and theres a 75mm bullet. The pictures I saw of the 77/80mm on the pro-m site all had an air filter mounted to them. Is this how they come or are those not for my application? Whats a good place to buy Pro-M meters? Thanks, Clay G.