Anybody replace the standard oiled S and B 5 X 9 air filter that comes with the JLT big air kit with its replacement...5 X 7 dry filter? I did this with the JLT prefilter sock and now I'm seeing some slight surging at 2000rpm cruise speed. Idle, acceleration, power are fine. RPMs above 2000 are fine, it just that one area. More annoying than anything. probably wouldnt notice on an automatic. I installed the diffuser. No different. I re-install the old 5 X 9 and it goes away. Lund did the tune. I have a ticket in but havent heard anything yet. Probably real busy. Anyone else experience this? I just cleaned the MAF. I doubt it will do anything. Id run another 5 X 9 but I think they are discontinued so I have to fix this.