They look like red Densos Toyota OEM YZZA1 style filters. I would not image they were all that bad on filtering as these are not touted for high flow, high performance applications. Surprisingly good value for a high performance name brand.
The denso filter from Toyota are not ranked high on filtering either by the way. Good enough for OEM, good enough for me.
Last edited by danez_yoda; 11/28/19 06:38 PM.