If i plan on running nitrous is it a bad idea to descreen my maf sensor??

 

Well, I don't have a N2O kit, but as I understand it, you're basically mounting the "plate" with the spray nozzles between the throttle body & intake manifold - the MAF is (usually) well upstream of that, & shouldn't care whether you're spraying or not.

(If your MAF does see any N2O, you've got some serious intake flow reversion issues!)

Now if you're somehow spraying your N2O upstream of the MAF, then none of the above applies, & you can just forget that I said anything...

 

Never a good idea to remove the MAF screen; it's there to direct the air properly over the sensor.