They have been proven to stop at least 99% of particles on a SAE dust test. Our filters are tested by an outside, independent laboratory. Most is opinions not based on any sort of factual evidence. One Internet "expert's" opinion is not reason for concern and should be taken loosely at best. If there were any sort of problem, one would think we would know by now and so would everyone else. Furthermore, does he realize that 96% meets OEM standards? K&N has been around for over 30 years and we sell over 2,000,000 units a year. The difference between 99.2% and 98.1% (his results) is 1.1% not 224% as he states!!! (: who didn't go to school, Jim was measuring the amount of dust that goes inside the engine).
Check the video above for more details.It is incorrect. But, don't expect oodles of extra ponies to suddenly show up when mashing the throttle. Yes, the aftermarket performance air filters do work. 20-60 mph happened in 8.81 seconds, and 45-60 mph took 3.49 seconds.
The K&N was, again, the best of the bunch. The CarQuest filter registered a 20-60 mph sprint of 8.91 seconds and a 45-60 mph time of 3.56 seconds. While the dirty and new OEM filters were nearly identical in their sprints (9.01 seconds from 20-60 mph and 3.61 seconds from 45-60 mph), the aftermarket air filters improved on that performance. The latter is to show any top-end performance gains. Jason measured the 20-60 mph sprint and the 45-60 mph sprint. With the data on hand, do the minor performance increases from the aftermarket filters stack up in the real world? In short, yes. The Crosstrek produced 164.3 hp and 142.5 lb-ft of torque.
The aftermarket filter made more power, but Fenske wondered if it's also actually filtering less in general.įinally, the K&N air filter promises to deliver more horsepower.and it did. Moving along, the CarQuest filter helped the Crosstrek produce 163.3 hp and 140 lb-ft of torque. Minor increases with a clean filter, to say the least. Next up was the clean OEM filter and the car returned 160.1 hp and 137.4 lb-ft.
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