I have stock MAFs on my car, and the Greddy MAF tube is 2.75". I am right near the end of MAF voltage and I made 586rwhp at 9.1psi on the dyno... and i often hit 10-10.5 psi on the street. My MAF voltages are coming within 100ths of a volt to 5.0v lol. Whenever I go to do some more tuning this year I will either upgrade the sensors or put some 3" MAF tubes in.
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