| Is anyone running air filters other than stock or JWT? I ran across this posting from Ash about the cheaper filters flowing more air in part because they have velocity stacks and air guides. Here's the excerpt: Three filters were taken to the flowbench today: JWT Pop-Charger Apexi Filter No-Name Generic K&N: 519.3CFM Apexi: 449.5CFM Generic: 528.4 Generic with center stack covered: 522.4CFM I wanted to point out a few things about these filters. First off, the MAS has an i.d. of 2.865". The Apexi filter's port is only 2.575" The K&N/JWT port is 2.985"
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