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. Too much hassle and not worth it in my opinion but it is just my opinion. nothing 450 bucks and a half day without my truck didnt fix. The latter is to show any top-end performance gains. and you run the risk of over oiling the filter and clogging the MAF sensor like i did on my GMC 4x4. Jason measured the 20-60 mph sprint and the 45-60 mph sprint. Many air filters are made from paper and use wire for structure. Most air filters are located inside an air cleaner or an air filter box for easy access. Fram Air Filter CA9997 Same As Ryco A1527 fits Subaru Forester SJ SH, Liberty BM (Fits: Subaru Forester 2009) AU 30.99. The air filter on your Subaru Forester traps and removes dust, dirt, and debris from the air before it is pulled back into the engine. With the data on hand, do the minor performance increases from the aftermarket filters stack up in the real world? In short, yes. BrandLine Air Filter for Subaru Forester Impreza Liberty Outback SF SG GC GD (Fits: Subaru Forester 2009) AU 23.95. The Crosstrek produced 164.3 hp and 142.5 lb-ft of torque. FS: Blitz LM high flow drop in air filter, Razo shift knob, bronze oil cap: FCmaniac: Tri-State Area Private Classifieds: 1: 02-08-2008 05:12 PM: i want to add a spt sti drop in air filter will it fit, in my 06 2.5i: rperillo2.5i: Newbies & FAQs: 3: 07-04-2006 08:51 AM: FS: K&N Drop In Air Filter for 2.5RS: paul25RS: Private For Sale. 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.

Subaru forester forum k&n air filter