First off engine displacement and engine component list. I have a h/c/i car with 24 lb injectors and use an 80mm pro-m intake tube kit. the standard is a 75 mm bullet.
If your intake is sufficient to justify the 24's, then I would think the MAF should be at least 70mm to 75mm.
I am just pulling these numbers out of the air though.
We do need to know more details about your car. A signature is a great way to convey that information.