how much?? who really knows?
how much?? who really knows?
Registered User
Joined: Dec 2004
Posts: 287
From: Saugus, MA
Car Info: 2001 WRB 2.5RS, Gold Prodrive P1's, Stromung Dual Tip, AEM SRI, Pink "i" fornt badge
im estimating about 4-6 horsepower. Either way its a good, cheap way to gain horsies and to keep your car from not breathing in crappy air.
Last edited by SubieStylez; Jul 11, 2005 at 10:47 AM. Reason: dont worry about it
Registered User
Joined: Jan 2004
Posts: 989
From: Automotive racist capitol of the world, Detroit.
Car Info: 2000 impreza 2.5 rs
my vote is always for getting an anti lift kit... I know on my car it made it handel way better and has a relitivly low price...
If you want go fast bits, I up graded my intake and noticed nothing, I added an under drive pully and experenced a little bit of gain, I got a borla header and noticed no gains, when I replced the head gasket i port matched every thing... so all of this leads to me believe that the performance restrictions are eather in the exhaust system or the computer department.
First step in any performance car is get it to breathe easier, intake and exhaust!
If you want go fast bits, I up graded my intake and noticed nothing, I added an under drive pully and experenced a little bit of gain, I got a borla header and noticed no gains, when I replced the head gasket i port matched every thing... so all of this leads to me believe that the performance restrictions are eather in the exhaust system or the computer department.
First step in any performance car is get it to breathe easier, intake and exhaust!
Registered User
iTrader: (5)
Joined: Feb 2005
Posts: 1,410
From: sacto
Car Info: '99 2.5rs - Rally Blue
i put a K&N into my 99L. it didnt do anything. and they filter about as good as a screen door. stick with your paper filter. sure your engine gets 5 cfm more air. big deal. the air it gets is absolutely horrible.
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Sr50R
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Sr50R
Last edited by svek; Feb 20, 2011 at 12:00 PM.
Registered User
Joined: Apr 2005
Posts: 27
From: N.Y.C.
Car Info: 2003 Impreza RS
I had a CAI before I put in the K&N. The CAI made it a little louder. Faster? Maybe a wee bit. After the K&N, not much differance. But remember to get the most out of any intake, you need to let all that extra air out via exhaust system. My EL Headers are on it's way.
Registered User
Joined: Sep 2004
Posts: 49
From: Puerto Rico
Car Info: 08 ReX
Another good starting mod is a kartboy short shifter..GREAT improvement over the stock.
This may sound a bit off but a catback also works great...less restrictive piping in my '05 RS really loosened it up. Also have a Green Filter instead of a K&N and did a snorkle-ectomy for the intake box.
This may sound a bit off but a catback also works great...less restrictive piping in my '05 RS really loosened it up. Also have a Green Filter instead of a K&N and did a snorkle-ectomy for the intake box.
Registered User
Joined: Sep 2004
Posts: 49
From: Puerto Rico
Car Info: 08 ReX
Originally Posted by samue_sato
where i can buy that shortshifter
they have a list of authorized resellers of their poducts and u can install it u're self.
http://www.scoobymods.com has the instructions on that..
Registered User
iTrader: (1)
Joined: Oct 2006
Posts: 8
From: Montreal, Canada
Car Info: Impreza RS 2005
K&N = fouled MAF sensor
Originally Posted by samue_sato
how much hp can a kn filter give a subaru 2.5rs 2005 and what you recomend to do as first modification is a 2.5rs2005 standar.
Had to clean the MAF sensor and put the EOM filter back and reset the ECU.
The car did feel more alive with the K&N though...
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