The official CAI/Exhaust thread for N/A scoobies

[impreza99obs]

i just bought a 99 obs a few weeks ago. i was thinking about getting a PDM and amsoil filter. later as i read more about CAI , i realize PDM/Ganzflow will blow my MAF sensor.

i wonder what intake will fit my car perfectly, as i don't want to spend too much money on it( less than $100).

thankz

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[BOY]

Originally posted by impreza99obs
i just bought a 99 obs a few weeks ago. i was thinking about getting a PDM and amsoil filter. later as i read more about CAI , i realize PDM/Ganzflow will blow my MAF sensor.

i wonder what intake will fit my car perfectly, as i don't want to spend too much money on it( less than $100).

thankz

Your options are:

Weapon-R (do NOT get the "Dragon" filter... its crap. The V2 is decent)

Use the stock front box and custom fab an intake tube. I've done this and it works well w/ a K&N, not quite the top end of the Weapon-R but a good cheap option.

Modify a Cobb intake, talk to Danzborin... he's the Cobb intake whore around here

[DanzBorin]

Originally posted by BOY
Your options are:

Weapon-R (do NOT get the "Dragon" filter... its crap. The V2 is decent)

Use the stock front box and custom fab an intake tube. I've done this and it works well w/ a K&N, not quite the top end of the Weapon-R but a good cheap option.

Modify a Cobb intake, talk to Danzborin... he's the Cobb intake whore around here

i'm the "i modified it his d@mn self since nobody else had done it yet! " whore...

injen makes a good intake that works on the my99... and like BOY said the Weapon R actually works really well... I think the MAF makes any intake really usefull on the 98s and 99s... right now I just have the Cobb bend and MAF adapter with a cone filter on the end, so essentially a weapon R... not quite as good, but still light years ahead of the Ganzflow/PDM combo on the MAP engines...

btw... BOY is the Weapon-R whore...

[BOY]

Originally posted by DanzBorin

injen makes a good intake that works on the my99... and like BOY said the Weapon R actually works really well... I think the MAF makes any intake really usefull on the 98s and 99s... right now I just have the Cobb bend and MAF adapter with a cone filter on the end, so essentially a weapon R... not quite as good,

Forgot about the Injen... good call

but still light years ahead of the Ganzflow/PDM combo on the MAP engines...

True, true

btw... BOY is the Weapon-R whore...

I'm the Weapon-R V2 filter whore... get it right, Rob

[CheezeWeezle]

I figured I would do an update to my current mods post:

I drive a 2002 OBS

Now I have:

Cobb CAI $269 new

Borla Headers $269 new from Subarustore.com(Good Vendor!) Headers were a perfect fit. I think they are the gen IV headers?

Borla Cat-back..bought from a fellow board member cheap with only a few hundred miles on it. Darn near brand new! The piping is 2" with what I measured to be a 4" tip This exhaust came off a 2000 RS. The only thing I had a problem with was one hanger on the muffler. I made it work though. I may take it to a shop to have it properly fitted.

Likes: Sounds like I drive a V8 now! On the butt dyno it feels like a ton of power now....even from a AT... ......Smoother power up through the rpm range. I can keep up with my fellow WRX buddies on the highway now Oh...and no CEL.....yet....

Dislikes: Can't think of any at the moment. Still getting used to the sound. Can be droning at low speed/ low rpms. Wife doesn't like it....Too bad for her!

[impreza99obs]

thanks boy and dan for the reply.

i m excited now, does my 99OBS have a MAP sensor?? i looked at some my00 on ebay and found out the intake is the same.



or is there any other ways to confirm my obs is map ?

[DanzBorin]

Originally posted by impreza99obs
thanks boy and dan for the reply.

i m excited now, does my 99OBS have a MAP sensor?? i looked at some my00 on ebay and found out the intake is the same.



or is there any other ways to confirm my obs is map ?

sure does look like a Map car.. the intake is identical to the my00-01 RS, and You can't see a maf...

[BOY]

I can't see the pic (firewall at work) but it could be depending on the build date... IIRC they switched from MAF to MAP mid run.

[DanzBorin]

Originally posted by BOY
I can't see the pic (firewall at work) but it could be depending on the build date... IIRC they switched from MAF to MAP mid run.

same layout as all other MAP cars... the filter box behind the TB with a 2 90 deg. bend intake tube that goes into the silencer... no filter box up front, and no visible maf...

[saar]

i bought my car with full custom exhaust....99'2.5......anyways..its like actully pretty much straight pipe right now..really loud...i want a new exhaust...smaller tip size....single tip preferabley...any suggestions....

[Pocket-Lint]

2002 2.5 RS

I don't frequent this forum, but I figure I'd post my setup for information

PRM CAI
Maxim Works headers. (makes a nice whistle noise starting at about 3k rpm. Sounds like a BOV when I let off the throttle. )

Bruellen Midpipe and Exhaust. (for some Throaty Boxer Rumble.)

The exhaust setup came off a GC8, it fits nicely but the previous owner didn't have any cats, but I looked underneath there doesn't seem to be any room for any CATS because the exhaust is bolted so high to the underbody of the car.

I have to run cat less.

[Zen]

Here is a little review of my Brullen header install.
http://forums.nasioc.com/forums/show...hreadid=429306

[DragonRM]

my00 rs

Weapon-R Dragon intake... the filter does suck but the intake is ok... I'm gonna slap a K&N on it this week or something as the bracket broke on the filter housing itself... I really want one of the new true ram air ones from rallispec but I a decent job first hehe... this intake sounds great and the power gain was good but yeah the filter and it's housing suck big time.

Stromung Dual Tip - I tried 3 different exhausts before I tried this one and it was by far the best... bout 500 from SPD Tuning. The guy who runs SPD and Larry Ganz know more about impreza tuning than anyone I've ever talked to It's got a really unique sporty sound to it... really accents the sound of the boxer engines without being overly loud... and the power band was highly improved over a single larger pipe...

Looking into lightened pulleys and headers next... have a pro-ecm chip I'm gonna install soon, just haven't got around to it...

[t0pk0w]

does any one have sound clips i got some frome a 2.5t with a blitz exhaust ( sorry dont remeber where they came from) and i was wondering if an na scoob could ever sound like this... (sorry it wont let me attach them anyone want to host them)

[mycarsux]

2002 RS (auto )

ganzflow intake: good for its price. ok power gains.

5zigen fireball or something universal muffler: pretty cool. combined with intake, i noticed some gains. more fun on freeway. love the rally pops. scare the crap out of people. fun in parking structures. magnifies the sound by 5 times. trying to get rid of it now. want something low pro like stromung.

wrx muffler: its cool. its stock. not much gain. sounds little better. love the bird sound it makes when revving or turning off engine.

got my stromung. it sounds nice, looks stock, so its good. doesnt pop as much as the 5zigen. o well. little bit more mid range power compared to the 5zigen. just bout a apexi n1 muffler from their garage sale. can't wait to put it on. waiting on borla headers and saving up money for high flow cat

[aj]

2000 2.5 RS Std. Trans

Ganzflow CAI
Exhaust: Borla Header $230, Stock Cat, Custom 2.25" Midpipe $40, STI Spec C Axle Back $250(approx 2.3")

This thing sounds awesome, nice and deep, but no resonance on the highway, easier to hear on downshifts. I don't know how much power I picked up, but it definitely revs better up top. The two things I like best about this exhaust is it was cheap, and no CEL!

I take it back the best thing about this exhaust is the sound.

[mycarsux]

oh uh...by the way, are the aem short rams anygood?? i dont see anybody that has one. they sell it for 210...hmm...looks kinda like the rallispec. the j-tube thingi with the filter on the front.

[DragonRM]

best things about the aem are they're all carb certified... so they're a legal mod anywhere. Depends on which one though you get performance wise. I hear the one that draws air from the bumper is the best.

[kleinkid]

2000 Outback Wagon 2.5L 4EAT
CAI: COBB $269
Exhaust: Stromung catback, dual tip, not sst, $355. Bought the
mid pipe about a year later, unk. price.
Header: Borla IV Gen. from RalliTek, $299.

Installed the header yesterday and have driven some but have not had a chance to really give the car a workout with it yet. Definitely know that it was worth the money. Performance is better, will have to drive it more to see where it is best shown. I already liked the sound with the exhaust and CAI(beautiful when you romp on it and it climbs above 3000 RPM and roars), and now it is even better. Header fit real nice. Header install--Unbolt at the engine, disconnect the two oxygen sensors, and break it loose at the mid pipe, makes it easier to get at the bolts where the header connects to the cat. Install can go back in piece by piece.

[kingpumba1]

'98 Legacy 2.5 GT Wagon

-Weapon R intake with silly Dragon filter from NOPI.com,$150? K&N on the way.
-GFB matched alt & crank pulley, still have interior lights dim at idle at night ($200 from Boxer4racing)
-Borla gen 4 SS headers ($200 wholesale acct w/Borla)
-Stormung SS hi-flo cat ($350 from Boxer4racing)
-Stromung SS hi-flo midpipe/resonator ($200 from Boxer4racing)
-Kartboy hangers ($30 from Boxer4racing)
-Borla/SPO rear muffler section ($270 wholesale acct w/Borla)
-upgraded power/grounds in engine bay
-Optima Blue Top battery

-The pulleys and intake were put on first, back in September, intake was a little loud but tolerable, engine felt like it reved much quicker with GFB pulleys, shaved 4 pounds off crank shaft. Minor but noticable performance improvements.

-Complete exhaust done early December, headaches.....
-after cracking a socket, stripping head, sheared 1 factory exhaust header bolt, drilled and re-tapped.
-original cat donut was unusable, wish it came with the hi-flo, 2 trip to dealer to get correct one, not a legacy part, I think correct one was from original WRX.
-o2 sensors didn't want to come free, re-used the originals and put anti-seize on all bolts.

As for the performance, WOW!!!!!!!!!!!!!!!!!!
The car was noisier than expected, being a wagon, nothing a little Dynamat wont cure, but glad I got the resonator. It has a nice rumble at idle, similar to a Ducati motorcycle. Above 3k rpm, it pulls VERY strong on the highway. Just got a new G-tech on ebay for $50, performance #'s to follow.......

No CEL, until this morning. SOB.......... checking it out tomorrow.

[Skylab]

2001 2.5RS
Ganflow CAI w/K&N Replacement Filter
Borla Generation 4 headers
2.25" custom cat-back exhaust w/ 18" Magnaflow Resonator
Flowmaster 60 Series muffler
Nice shiny tip


This is my install thread

[blueimpreza25rs]

2002 RS (5spd)

Cobb Intake (269 new)

Apexi N1 cat back (450ish new)

love the sound and look.

got a short little clip of the exhaust sound, Pdabr0wa on AIM
(0 = zero)

[socalrsdriver]

MY2000/SUBARU/IMPREZA/2.5RS/Manual

Homemade CAI cost $12

Borla Ver. 4 Header cost $279
Internet

Custom 2.25" Testpipe/trackpipe(cat eliminator) cost $50
Local Muffler shop

Custom Midpipe 2.25" cost $50
Local Muffler shop

Stromung axel back dual tip muffler cost(was on the car when i bought it)


Likes:

Stromung=deep sound

CAI=not as jerkey louder, deeper faster reving

Header=not much maybe a little on top, quieter inside louder behind

testpipe&midpipe=a lot more on top and raspy but WRC car raspy(it sounds gooooood)

Dislikes: CEL comes on due to no cats(have to replace cats and intake in order to pass smog(intake= visual inspection)

Other Comments:
I got the test and mid pipe so cheap because i fabricated my own flanges and fit and welded everything myself. So i paid less but spent an entire weekend on it. was it worth it?

It sounds like a friggin WRC car of coarse it was worth it stupid

[Siper2]

Such an old thread, yet I've never seen it. Weird.
(Well unless I replied once and forgot since...)

'00 2.5RS, ~100,500 miles, 5-spd.

K&N air filter. Purchased ~ summer 2000.
LIKES: Uhm.... bling?
DISLIKES: Cleaning's a pain.

BroSpeed muffler/intermediate pipe (or at least I THINK I got the pipe). The factory-option one. Cost? I don't remember, but it was too much. Purchased: May 2000.
LIKES: Sounds pretty nice, actually. Very subtle, much more noticeable from outside the car. (Sounds obvious, but some exhausts are noticeable inside the cabin. Mine isn't, really.)
DISLIKES: Costed me WAY too much at time of purchase. Not sure how much wider piping is included, honestly I've never looked.

Kartboy Hangman exhaust hangars (black). Kartboy.com. Purchased: sometime mid-2002.
LIKES: That muffler/exhaust isn't going ANYwhere.
DISLIKES: **Royal** pain to install.


PDM-Racing CAI, not currently installed. Ordered from PDM direct, $50 US (~$75 CDN at time of purchase in 5/03).
LIKES: Uhm, looks shwanky under the hood.
DISLIKES: Haven't noticed any gains/changes. A little extra noise at WOT, perhaps. (I guess that's a "like" ...!...)


Plan: upgrade to 2.25" piping all the way up, if I need to. (Does anyone actually know how far back the "intermediate" pipe goes? And is it a 2.25" pipe? What's the stock piping? So what else would I need to replace, just a center section behind the cat?)

Eventually will get a Scoobysport exhaust, high-flow cat. and some Revolutions Motorsports headers.

-S2-

[bigdweeb]

S2:
The exhaust sections are as follows from the engine back:
headers - cat section (includes both cats in the one pipe in your case) - mid (intermediate) pipe - axle back muffler section. Stock piping is 1 7/8" or the metric equiv IIRC.