maf ?
you can remove the screen and it will run fine. done it, currently doing it, cars fine been fine for 2+yrs
either do a speed density tune (SD tune) or stick with the STOCK MAF, and use PE mode to get your desired AFR.
the power and airflow your going to be seeing is going to be pretty decent, you can bullshit the MAF by just adjusting PE mode to be richer to achieve your desired AFR.
use the stock MAF and just use PE mode....it will save you a BUNCH of time and hassle, along with money



