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#1
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Hey, I am planning on changing my drop in air filter soon and wouldn't mind getting a few more HP. I was curious what the best one is? The options I know about are K&N, Green filters, stock filter, and I read something about people using STI air filters. Any help would be appreciated. Thanks
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#2
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Best in my opinion is the OEM paper filter. It filters more dirt and no filter alone has ever proven to "add" horsepower. Even if it did, it would be such a small gain it would be pointless. Some people like the STI filter, but I think that's because it says STI on it.
![]() Maybe if you were making more power than stock, I would look into it. Maybe.
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"That which can be asserted without evidence can be dismissed without evidence." '92 Dark Teal SVX LS-L, >146,000m 3 pedals, 5 speeds., restoration underway. 2012 Honda Insight, slow but cute. ![]() |
#3
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K&N filters are pretty good BUT you have to keep them clean & oiled, at least every 20k you gotta clean it with the filter cleaning kit.
Perrin makes a pretty good foam air filter http://www.perrinperformance.com/pro...gory=3&model=2 I've got an OEM filter in mine, I've been satisfied with it so far, although I'm tempted to get an STi filter from work and see how it does ![]() Just don't get a Fram, Fram filters are ![]()
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1992 SVX LS-L #1222 Pearl White 1987 GL Turbo wagon, 5 lug conversion, D/R 5 speed (Rice killer) 1992 Dodge Ram 4x4 diesel (car hauler) 1968 Dodge Polara convertible (Camaro killer) 1990 Toyota Corolla FWD auto (330,000 mile grocery getter) 1986 VW Jetta |
#4
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i actually have a k&n filter and found that my car seems to like the disposeable filters better. im selling the k&n off wih my black 97 and keep with the "mechancs reccomendation" on my current
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I Leave late and STILL manage to arrive early ![]() Car #26..'97 SVX Silver (120k and climbing) previous SVXi: Car #24..'94 SVX Ebony 216k (sold) car #18..'97 SVX LSI "Ebby" Pearl 175k (sold) car #19..'97 SVX LSI Brilliant Red 103k (sold) car #14..'92 SVX Claret LS-L Touring (sold) car #13..'94 SVX Laguna Blue LS (sold) |
#5
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Green filters are nice i think they flow better and filter better than k & n
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Seth 94' Barcelona Red w/ Tricoat black 2-tone AWD Ls -Sold Mods:AWD conversion/4.44 swap by Budfreak, Custom red interior lights, Custom Satin black dash, Power mode switch, Cold air intake, Permecool tranny filter,Sony xplode 10" sub, Sony xplode 1000w amp, Blitz in-line driver, DDM Tuning 6000k HID's, New paint job/body work by me, 97' Grill, QC shift kit, 17'' MB Motoring rims, 15&20 min mod, front & rear urethane swaybar bushings, Custom fiberglass sub box, Custom red led a/c control unit, perrin lightweight crank pulley, Black wrinkle finish powdercoated intake manifold w/ clear hoses , 02' outback heated/power black leather seats Soon to come:Fiberglass hood, upholster ALL suede to black leather Past subies: 92' Pearl White/black top LS-L-SOLD 96' Legacy Outback-TOTALED 99' Legacy Outback Limited 30th anniversary edition-TOTALED 98' Forester L -Totaled Other toys: 99' Forester S -WRX brake upgrade, soon an 04 wrx motor swap 06' B9 Tribeca-Stock 1982' Yamaha xj650 Maxim Mods: work in progress |
#6
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K&N does not filter well... I have a Green air filter in the red car and a STi filter in the silver car. IF there is any gain from putting the Green filter in exchange for the OEM paper one, it is negligible.
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Former: 1994 Barcelona Red(x2), 1995 Brilliant Red, 1992 Liquid Silver, 1992 Ebony(x2), 1992 Pearl White (x2) Current: 2017 Ford Raptor 2017 Kawasaki KLR 1995 Guards Red Carrera 1995 Spec-ish Miata - track car 1957 CJ-5 |
#7
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In my opinion, using any oiled filter like a K&N will not be beneficial, the oil used tends to foul MAF sensors before their time. Any filter that 'flows' better by most likely 'filters' less particulate matter... e.g. you'll see the biggest increase in horsepower by not installing a filter at all. Any dry filter like Green or AEM or STI won't hurt, but the difference between them and the OEM is noticeable only in your wallet
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1992 Pearl White/Black Onyx Subaru Alcyone SVX LS-L Donating Forum Member In Good Standing JDM 4.11 Geared Transmission JDM 'ALCYONE' Rear Panel JDM 'BOXER' Eingngine Cover JDM 'SVX' Hood Badge L-Edition Suede Rear Seats |
#8
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Quote:
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! ![]() |
#9
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Agreed. I have replaced many MAF because of non oem filters that either come apart or deposit the oil on the sensor element. I don't think you need to worry about the filter... yeah the K&N will flow more air, per cubic inch, but the stock filter is big enough to flow more than enough air for the engine...
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2007 GS 450h-Active Stabilizer/Radar cruise 1994 L Blue 3.70 VTD ASE Master Automobile ASE Advanced Level Specialist Toyota Master Diagnostic Technician (former life) |
#10
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I bought the washable fram filter, and it works great, and you don't have to oil it!
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-Nate '92 LS-L Pearlie |
#11
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I just got one of those also, I hope i can drive the car soon to test it out.
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