I agree, I put my K&N to the side a while back because I noticed that my MAF was dirty all the time. Truthfully I didn't notice a power gain when I did have my K&N. I did notice I was $50 lighter in my wallet. <img src="/forums/images/graemlins/shiner.gif" alt="" />
Update: I did clean out my T'Bore, it had the remnants of the dirt/oil from the K&N all around it. That could have been part of the problem. <img src="/forums/images/graemlins/kewl.gif" alt="" />

03 Double Cab TRD.. ARB, warn winch, OME coilovers, Alcan leafs, Bilstiens, Sky E-locker guard, etc, bla bla bla