They all perform about the same. Look for the cheapest you can get and roll with it. I believe that consensus is still to use a 9" long tapered cone filter with a 4" neck.
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WizAire CAI w/9" K&N & HV3, 2.5" d/p w/h/f cat, Cobra CB, PowerSlot slots w/Hawk HPS, GR-2s, GMPP handling kit, NextLevel STBs, Pilot Sport A/S Plus tires.
98 L36/MM5
RaC