I recently picked up a 90mm Lightning MAF cheap. Would I see any gains if I installed it on a N/A PI-2V? Of course I would tune it it via Xcal2. Or would there be any losses?
depending on what you already have as your mods. "I see your signature says too many to list" I say if you already have, injectors, TB, plenum, cia. next step up would be maf. But make sure that it's calibrated for your size injectors. Because there is a lot of cheep maf's that you can buy from lightning that are brand new in box for $79, but remember they are not calibrated for injectros.
You won't gain anything from the LMAF on a NA car unless you have a hardcore NA setup over 350rwhp...The stock 80mm MAF flows well and usually won't peg NA.