I have one of them big AFE super bad arse filters, it sucks. No really it sucks, just like the stock filter it replaced. MAYBE 75* less EGT, but they were not high to begin with, so what did I gain? I gained NOISE, lots of noise. Noise sucks to me, but if you like noise by all means buy a buy AFE. The STOCK filtration is good for 350 RWHP +. Until you get there you are buying cool points, noise and stroking your ego with "improvements" in air flow on the intake side. It just is not worth it.