Yeah while it's true that not all filters are created equal, it's not like it's the sponge type that HKS uses which filters nothing, or the metal mesh that Blitz uses. People still use the HKS filters even though they filter like shit and I haven't hear anything about motor damage from people using them. My guess is that for APC to make it that cheap, they gotta buy that filter element from somewhere that makes them in large quantities, aka supplier for other companies too. Honestly, I don't see how using a no-name filter can be all that bad.
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