It's not high efficiency but still much better than the oem or most of the other after market crap out there. It contains about 1/2 gallon of oil and it's much better made than a lot of filters I've seen. 2 years ago, we decided to open as many filters as we could to make our own opinion about it. We found out that Mobil 1, k&n, luberfiner, champion, STP were all made at the same place, but for different prices, very well made filters. Fram, mastercraft, defender, all the same junk, not much paper, cheaply made and the bypass is very soft, meaning, you'll never burn an engine but you'll have a lot of crap in it. Purolator were probably some of the best made filter but very hard to get in Canada. At the time I settled for luberfiner (6$ea compare to 20$ for k&N, almost the same thing. ) The hole pattern and the crimp on the filter is patented for each company so if you see the same crimp on 2 brands, it's made at the same place. The cat filter seems really different (plastic tube) and I saw some cut out at the store and they seems really well made. I guess industrial is somewhat different than our automotive crap. The specs are almost the same as our oem. The bypass is a bit softer (7 to 9 psi compare to 8 to 11.) it shouldn't change much.
_________________ 2006 CRD KJ, 245/70R16 A/T KO, GDE eco tune, ARB bull bar, OME lift, AVIC-N4, turbo timer, pulsetech solargizer, Racor CCV3500, Racor 245R122 fuel head, Caterpillar battery, oem light bar, KC lights, HID fog lts, cb, ...
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