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Old 04-14-2003, 07:35 PM   #1
munkis
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Member#: 1847
Join Date: Jul 2000
Chapter/Region: Tri-State
Location: brokenmotorsports.com
Vehicle:
Team Broken: V6 GF
rallyarmor.com

Default The OFFICIAL CAI/Exhaust thread for N/A scoobies

The perfect place for everyone to post there CAI and Exhaust system combinaiton. Exhaust: including high flow cats and headers.

Basic posting suggesitons.

Vehicle Year/Make/Model/Engine size/trans type.
CAI type and Cost:
Exhaust type/size Cost:
Place of Purchase
CAI:
Exhaust:

Likes: such as proven power gains.
Dislikes: such as noise level/resonence/power loss/CEL

Other Comments:

and what ever else you would like to include. I suggest using the above format or basic varation there of, to help make it more readable for users searching through the thread.

Enjoy
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Old 04-15-2003, 12:20 AM   #2
Die Civic
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Join Date: Dec 2000
Location: Queens, New York
Vehicle:
2001 RS
Aspen White

Default

01 RS

Injen cai - paid 200

Blitz Axle back mounted up to A'pex-i N1 Mid pipe - 370 for exhaust, mid pipe was left over (roughly 100-120)

From a friend

No proven, but definitely noticeable high end enhancement, no noticeable loss of low end

Exhaust is a bit loud, makes interior cabin some what unenjoyable to be in, intake is a PITA to install, and needs a lot of tweaking if not properly installed.

Would definitely buy both again if I had to, I would opt with a custom made mid pipe instead next time, the apexi was a headache to fit to the blitz.

A good idea would to be to gut out the orange vent in the bumper, and pop out the signal lamp if you're hitting the track.
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Old 04-15-2003, 12:39 AM   #3
JC
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Vehicle:
2006 Pontiac GTO M6
Triumph Street Triple R

Default

'00 2.5RS / 5spd

Rallispec - paid $25

Greddy EVO catback - $250?

Both used in the private classifieds.

Likes: Sounds awesome, revs a bit easier, definitely faster, fairly quiet at cruise, sounds stock at idle.

Dislikes: My filter keeps falling off (the intake is missing a few pieces ), loud as hell you can hear my car from a few blocks when I gun it (not that I mind all that much), people keep putting their foot in my exhaust to show how big the tip is .

Powah gains: A friend's car put down 129hp on Cobb's dyno with the Rallispec, borla headers, pulleys, and some catback. Made 133 w/ a Cobb with the Rallispec catch can.

Videos if you want to hear my car...
http://www-personal.engin.umich.edu/~jmclachl/

EDIT: Put the Cobb on today. I like it a lot more. Power delivery is smoother and it's a lot quieter.

JC

Last edited by JC; 04-18-2003 at 04:40 PM.
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Old 04-15-2003, 10:38 AM   #4
JohnP555
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Join Date: Jun 2002
Location: Worcester, PA
Vehicle:
99 RS
Rally Blue Pearl

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99 RS/ 5 spd

Intake: Weapon R $180 forget where I got it

Exhaust: Apexi N1 cat back $520 from Rollhard Performance

Likes: I must admit that I love the sound, but it is loud. When getting on the throttle the weapon R screems to life and scares the crap out of those around me . Compared to stock the car revs much quicker and overall I notice a nice gain in performance across the rev range. Exhaust has a nice mean grumble to it. When you are just cruising this combination is very reasonable, but when I get on it watch out, it seriously comes to life.

Dislikes: The occasional backfire, due to the intake. Slight loss in low end torque but it does not bother me too much. At WOT the sound from the intake rattles the hell out of the cabin, oh well.

Power gains: Like I said I think the combination works well together. Significant improvements in top end, but still all around greater performance across the power band. No dyno results, just guessing maybe 10-15hp increase from the combo.


Comments: After extensive searching on the board about intake/exhaust combos I chose this one. Very happy with my purchase and would highly recommend it to other RS owners.

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Old 04-15-2003, 11:10 AM   #5
DanzBorin
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STI) prev 05 STi (white)

Default

MY99 Impreza 2.5RS, Manual Transmition, Coupe

Intake:
Cobb Tuning (used $200)
parts to modify for MAF (~$70)

Likes: Huge power gain... Little or No low end loss... Increased Throttle response... Pulls Hard to redline... Distinctive Sound

Dislikes: No model offered by Cobb tuning for my98-99... Due to modifying for the MAF was a bit expensive

Exhaust:
MRT Header back w/ Greddy Evo Axleback (used MRT $300, Used greddy axleback $120, cost to mate axleback to midpipe $20)

Likes: Price (even new this system is far cheaper than any other header, hi flow cat, catback combo)... Best Dyno proven gains I have seen yet (and it translates well to the butt dyno)... Good design (first header I have seen for a subaru w/ an 'H' pipe to equalize pressure)... Equal length... Greddy EVO keeps things low and quiet, but not as quiet as the MRT axleback...

Dislikes: Mild Steel construction (this is more of a mental thing... i have yet to hear of an MRT system rusting anywhere other than the muffler)... Sound is not as good as the borlas, it's a bit raspy at high RPMs, but this is more common with equal length headers and well worth the trade off for power...

Other:
Even brand new, the combination of these would cost right around $1000 and would be almost the same as a cobb stage 2, just minus the crank pulley...

I chose these mods purpously as they all got great reviews and result in large power gains... Happy Mod Hunting...
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Old 04-16-2003, 10:18 AM   #6
NC2.5RS
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Location: Asheville, NC
Vehicle:
2007 Scion tC
Black Sand Pearl

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MY00 Impreza 2.5RS, 4EAT, Coupe

Intake: Cobb Tuning ($175 used)

Likes: Great power gain....great distinctive sound....hardly any loss down low....nice increase on throttle response.

Dislikes: NONE

Exhaust: MRT Headerback w/ gutted cat and Magnaflow Axle-back ($400 used)

Likes: PRICE obviously. The sound is amazing. Butt dyno proven to provide great power increases. Best dyno proven gains. POWER POWER POWER. The car pulls a LOT harder since I installed the exhaust. Equal length rules. You can hear my car coming from over a block away when I get on it. If you like loud, then this is definately the exhaust for you.

Power gains: About 20hp at the wheels from the exhaust alone, another 10 or so from the intake.

Comments: One of the best combinations for exhaust and intake out there. If you like the sound of the Cobb intake A LOT, with these headers you wont be able to hear the intake.
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Old 04-16-2003, 10:54 AM   #7
Deznuts05
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Join Date: May 2000
Location: Purcellville VA USA
Vehicle:
2011 X5 Diesel
Space Gray

Default

2001/Impreza/RS/2.5/Manual
CAI type and Cost: 3" tube from right fender to stock air box. $150 shipped to my door.
Exhaust type/size Cost: Borla 2nd Gen. Headers, Stromnung Cat-back and SS Dual Tip Exhaust.
Place of Purchase: Private Buy from this board.
CAI: Larry Ganz CAI w/ K&N air panel
Exhaust:Borla and Stromnung
Likes: Haven't dyno the car yet. But I was able to make 15.2 avg 1/4mile times @ Atco 70 degrees outside. Best time was 15.0089
Dislikes: Noise level isn't bad at all. very quite inside the cabin but outside very deep and nice rumble due to the Borla. As for power loss some low-end power loss due to the larger diamerter pipes and lost of air banks for intake, but still more low-end torque than the 2.0 WRX. CEL 24/7 due to the free flow exhaust.

Other Comments: I would highly recommend this setup for urban areas. Where street racing is prone. Nice low tone but at WOT very loud and intimeidating. On the street I can take most Naturally Aspirated Imports and V6 Musscel. What make my races interisiting are turbo-ed imports or factory turbos.
Well worth the price I paid.
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Old 04-17-2003, 01:13 PM   #8
joefocker20
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Chapter/Region: RMIC
Location: Colorado Springs, CO
Vehicle:
2004 STI
Silver

Default

2002 2.5RS

Exhaust: Stromung Catback
CAI: Ganzflow
Headers: Borla - Arrive the 22nd

I dont really know what gains these provided, I dont really remember what a RS drives like stock. The Stromung sounds good when its warmed up, when its not, for some reason its rattling against my rear diff even with Kartboy Hangers. I don't feel that I've lost any lowend torque, but I gained some power in the higher revs. With a Ganzflow CAI, K&N Panel Filter, Borla Headers, trackpipe, Stromung Catback, LW Crank Pulley, Exedy clutch and 13lb flywheel, and about 100lbs removed; I beat a stock WRX to 75 without launching.

Last edited by joefocker20; 06-02-2003 at 02:01 PM.
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Old 04-17-2003, 02:46 PM   #9
BOY
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Join Date: Sep 1999
Chapter/Region: MWSOC
Location: Ft Wayne, IN
Vehicle:
99 RS-T RIP
02 Forster-S

Default

99 RS/5MT

Intake/filter: Weapon-R (V2, not Dragon), paid ~$200 back in eary 00 from Challenger Deep

Likes: Great power, good sound, incredible throttle response, noticed very little low-end loss. Compliments UD pulley tremendously. Works wonderfully with Cobb Street Cams, Still use filter today

Dislikes: none

Comparo to other CAI/filter combos: custom PDM style w/ cotton guaze (K&N style) cone filter (my 99), on MY00/01 Cobb CAI, Ganzflow. Comparo: Weapon-R on my MY99 even before cams had much better response and felt (butt dyno) quicker... others, smoother power delivery

Exhaust: Custom (Arospeed/generic muffler, 2.25" catback, Catco high flow cat, cusom header), paid ~$100 for muffler, $80 Cat, custom exhaust/header ~$200 (installed in pieces from different exhuast shops)

Likes/dislikes: Its custom, it sounds good and it didn't cost a lot of money.

Dyno charts POST cams are posted in various forums

Last edited by BOY; 04-17-2003 at 02:53 PM.
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Old 04-19-2003, 02:06 PM   #10
nomorefocus
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Member#: 9677
Join Date: Aug 2001
Location: Peoria, IL
Vehicle:
2002 2.5 RS
Aspen White

Default

2002/2.5RS/5spd MT

CAI type and Cost: Cobb CAI/$260
Exhaust type/size Cost: Cobb cat-back/$570, gen 4 borla header/$290, high flow cat/$250 not installed
Place of Purchase
CAI: Cobb
Exhaust: Cobb, Borla

Likes: Nothoing beats Cobb's intake for performance. Exhuast is fairly quiet compared to some others I've heard. Borla header makes the car sound really good. No low end loss after header install.

Dislikes: The CAI lost its little silicone thing on the end and rattles in the fender... I do not have the time to install the high flow cat or the tools and no one will touch it. The Borla header really didn't fit very well. It had to be heated and bent slightly to fit. Header also makes it a little harder to get to the oil filter for oil changes.

Other Comments: I believe if I can get my high flow cat installed it will will let the Borla header work better. Borla isn't the BEST, but with a high flow cat section it is on par with any other header/cat combination for power. However I would not buy Borla again, because there are better choices out there.
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Old 04-19-2003, 03:23 PM   #11
imprezive
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Join Date: Jan 2000
Chapter/Region: South East
Location: FL
Default

00 RS

Intake: Cobb
Love the sound! You can't hear it unless you are WOT in which case it sound awesome. Butt dyno was very happy. No loss down under, and better pick up in the top end.

Exhaust:
Blitz axle back, borla headers, custom in between
BEWARE! very loud! But sounds incredible, the deepest, best sound 4 cylinder I've ever heard. No loss down under and PULLS very hard abouve 4k RPMS
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Old 04-19-2003, 07:02 PM   #12
pdximpreza
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Member#: 17606
Join Date: Apr 2002
Location: Portland area, OR
Vehicle:
2002 Impreza 2.5RS
Aspen White

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I have the Cobb intake and exhaust.

Very impressed with the sound.

I have lost some low-end, but i like it, shifting isnt nearly as jerky as stock. Mid and high end is much improved.
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Old 04-20-2003, 11:00 PM   #13
NC2.5RS
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Join Date: May 2002
Chapter/Region: South East
Location: Asheville, NC
Vehicle:
2007 Scion tC
Black Sand Pearl

Default

I have yet to get a CEL with my gutted cat. Weirdness.
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Old 04-22-2003, 06:53 PM   #14
windfactory
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Member#: 16108
Join Date: Mar 2002
Location: CA, Bay area
Vehicle:
02GD Tuned EJ251 NA
Blue Ridge Pearl

Lightbulb

02 / 2.5RS / 5-speed
AEM short ram with follow optional air filter:
APEXi Power Filter (DIY adapter) - now using - the best result I've got, love it.
MonsterFlow - good lower rpm power output, but the high rpm seems dropping power by using it.
AEM OE filter

DragunFire universal Muffler plus custom-build cat-back mid-pipe.
Extreme nice sound at high rpms, deep and loud (with out the silencer); just like the N1/5 Zigen cat-back!

Likes: I'm fine with the setting for now so far, everything is good and enough for the EJ25 NA engine. Such as sound, low to high rpms pick up... just looking forward to have the header.

Project coming up: I'm trying to DIY a 2nd intake system for the motor, more data will coming up.

All sponsored, just the mid-pipe cost $140 weld-on with the muffler.
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Old 04-23-2003, 12:38 PM   #15
lethargicman
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Join Date: Aug 2001
Chapter/Region: SCIC
Location: My bed room! :P
Vehicle:
2001 Impreza GM6
Rest In Peace. 2/01-10/04

Default

Vehicle Year/Make/Model: 2001 Impreza 2.5RS Coupe
Engine size: 2.5L
Trans type: 5-speed manual

CAI type and Cost: Aluminum tubing. Forgot, got it used. $135 I think.
Exhaust type/size Cost: Semi-full exhaust system, 2.25", about $600 ~ $700.
Place of Purchase: Lots of places.
CAI: Akimoto Racing Sports
Exhaust: Borla headers, stock cats, custom mid pipe, stromung dual tip muffler.

Likes: Exhaust note is incredible; low rumble, sounds like WRX, and not too loud.
Dislikes: Not that impressed with intake. Have to cover filter everytime car is washed or heavy rain falls.

Other Comments: May be swapping out intake with top mount intake.


-Jason
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Old 04-24-2003, 12:35 AM   #16
AustinSTi
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Member#: 9386
Join Date: Aug 2001
Location: H-Market, VA & JMU
Vehicle:
2000 2.5rs sedan
silverthorn

Default

2000 2.5RS
CAI: Cobb, $260
Exhaust: Borla Header $400, Borla catback $350
purchased both from spo motorsports
Dislikes: only 2" midpipe
Likes: great sound and rumble to it, very responsive
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Old 04-24-2003, 07:05 PM   #17
Hellsing
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Member#: 35634
Join Date: Apr 2003
Location: Sacramento
Vehicle:
2003 2.5 rs
platinum

Default

does anyone know when the AEM cai
is going to be out for the 2003 rs
and is the rallitek a cai
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Old 04-25-2003, 08:14 AM   #18
DanzBorin
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Location: Houston - Back in the Alief
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2008 STi DGM (3rd
STI) prev 05 STi (white)

Default

Quote:
Originally posted by Hellsing
does anyone know when the AEM cai
is going to be out for the 2003 rs
and is the rallitek a cai
AEM isn't making a CAI for the RS at all... they have a short ram...

rallitek isn't a CAI by the standard definition...
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Old 04-25-2003, 03:54 PM   #19
Hellsing
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Member#: 35634
Join Date: Apr 2003
Location: Sacramento
Vehicle:
2003 2.5 rs
platinum

Default

on AEMs web site they have a part # for the 2003
impreza cai
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Old 04-25-2003, 04:03 PM   #20
DanzBorin
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Join Date: Jun 2001
Chapter/Region: TXIC
Location: Houston - Back in the Alief
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2008 STi DGM (3rd
STI) prev 05 STi (white)

Default

most likely WRX... if not, they screwed subaru owners again...
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Old 04-26-2003, 06:20 AM   #21
jasona
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Member#: 11786
Join Date: Oct 2001
Chapter/Region: AKIC
Location: Alaska
Vehicle:
2014 OB 2.5i 6MT
Silver

Default Re: The OFFICIAL CAI/Exhaust thread for N/A scoobies

2002 2.5TS 5 speed

Weapon R / K&N filter - $150 for the intake and $30 for the filter
Custom header back, 2.25, no cats - $130

Likes: Pulls hard to redline, actually feels stronger on top end than midrange (unlike stock). Sounds super mean at idle, has some nice frequent rally-esque pops and even spits fireballs occasionally

Dislikes: loud over 2500 rpm, buzzy when let off throttle and coasting. slow throttle response

Other Comments: about $300 for a full second off my 1000ft et's, I'm happy
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Old 04-28-2003, 11:27 AM   #22
Teamugi
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Member#: 7771
Join Date: Jun 2001
Location: Atlanta, GA
Default

Vehicle Year/Make/Model: 2001 Impreza 2.5RS Coupe
Engine size: 2.5L
Trans type: 5-speed manual

CAI type and Cost: GanzFlow Cold Air Intake. Cost: not sure, came with the car when I bought it.

Exhaust type/size Cost: SYSMS headers with hi-flo cat. Mated to a Greddy Evo midpipe (2.25) and muffler $1600-1800.
Place of Purchase: Headers and exhaust bought from i-clubbers, before the split.


Likes: Car sounds mean. It is loud at WOT, and is very deep. Intake is nice and deep and throttle response is quick. The headers and exhaust has made my car pull to redline harder and quickier. The car sounds like a true rally car, exhaust pops when changing gears Hwy crusing is not bad thanks to the muffler's sound dampening material. Never drove a stock RS, but I assume mine is quicker.

Dislikes: Headers resonate a lot. Drones when you coast while staying in gear. However, changing gears makes a noise that sounds almost like a wastegate opening up. Lots of people comment on that. I get CEL when it gets cold and when crusing on hwys.


Other Comments: Overall I love my car and the way it sounds. the uniqe sound my header makes, just gives my car more character. I just want forced induction now. Eventually I may switch to a Cobb intake and to a scoobysport/stromung exhaust.
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Old 05-19-2003, 02:47 PM   #23
kickin_81
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Member#: 16679
Join Date: Mar 2002
Location: MN
Vehicle:
2004 Forester XT

Default

2000 Subaru Impreza 2.5 RS Manual transmission
Ganzflow CAI w/ Amsoil panel filter ($100/$40)
-Both bought from Larry Ganz @ www.imprezars.com
MRT header/cat/midpipe combo w/ Bullet Performance muffler (2.25" all the way) ($530/$80+55 installation)
-MRT header from Exeter Subaru / Bullet muffler from www.thehitchshop.com

Likes:
-intake- I don't remember how stock performance was before I installed the Ganzflow, but it pulls quite well. It's quiet as stock at cruise, but increases in sound by a bit at WOT. I've done the 3" elbow mod and this increased my top end by a small margin, too. Best part is, I don't have to clean the throttlebody or intake manifold... the Amsoil filter trapped over 99% of the dirt that passes into the airbox while (after seeing some tests done) out flowed the K&N filter by a small margin.
-exhaust- They are correct when the MRT produces up to 14whp gain. After my ECU remapped it's fuel curve, the motor just pulls you more into the seat throughout the rev band. The top end doesn't feel like it's losing power anymore. It's more like it keeps that power. The replacement with my straight-through muffler increased my top end even more. I don't think I lost any low end with the muffler I swapped to either. No CEL. The sound is great for a sporty car. It sounds between a V8 and a rattling Civic without the raspyness. The backfires I get from time to time are actually quiet 'pop' sounds. The muffler and tip combo I used isn't asking for cops to bother me.

Dislikes:
-intake- It won't absorb heat (I have my hood vents open), but it's not resistant either.
-exhaust- Just the fact that it's not made out of a metal that's able to withstand rust. It's showing rust (one Minnesota winter), but I give it 4-6 years until I'll need some patching/replacing of the system. The shipper (fedex ground) caused scraps and scratches through the protective paint of my header. These areas, of course, already started to rust.

Overall, the car feels much less like a stock Impreza RS. One time in 4500 rpm, my front end lifted as high as my hood scoop when I WOT in first gear. I need to install my anti-lift fit. My car pulls very strongly when I'm launching. If I wasn't living up at 800 ft of elevation, I would be getting at least a 14.9. Here in MN, my best is a 15.2. Other local cars are getting .3-.5 seconds slower than manufacturer's times (stock). For under $1000, the performance of this car has changed very much. I'm very happy I found the Impreza RS in the first place.
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Old 05-30-2003, 12:58 AM   #24
BAN SUVS
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Join Date: Nov 2002
Location: Reno, Nevada
Vehicle:
2004 FXT 4EAT
very STi'd

Default

2001 RS 5 speed

Ganzflow intake with K&N
Borla headers w/stock exhaust for now

good- Ganzflow improves high end a little over stock, sounds as good as my prior snorkelectomy without sucking hot air. The Borlas change the quality of the sound for the better, but the stock muffler keep it too quiet.

bad- Maybe 5-8 wheel horsepower out of the combo. Nothing to sing about. No other flaws though so far.

The whole thing will become much more effective when I get around to having my custom catback and a high flow cat installed.
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Old 05-30-2003, 06:30 PM   #25
SubaSonic
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Member#: 11365
Join Date: Oct 2001
Location: Phoenix AZ
Vehicle:
02 N/A, A/T Wagon
Sedona Red Pearl

Default N/A stuff

2002 T/S Sedona Red 4EAT
Cobb CAI: $150 used from Private 4 Sale
Brullen: 4-2-1 Ceramic coated Stainless Header (original group buy) Wraped to keep the heat in
Brullen: Stainless Mid pipe
Brullen: Stainless Med Dual tip Exhaust $1,200 or so (It was a year and a half ago. I dont remember)
GFB underdrive pullys
A high output alternator
Hotchkiss Front and rear swaybars
Whiteline bar links
WRX brakes
MRT master cylinder bracket
Whiteline Front Strut bat
Cusco Rear Strut bar
WRX carbonfibre hood
Liberal Front and rear body kit
WRX side skirts painted black

I have lived with the Cat effeciency Cel,from day 1. I was resetting untill palm pilot and cord was stolen from my car. Brullen promised a fix(way back when), on several occasions, that never came (If I had a dog he would wizz on their leg). I soldered in a pony express a few weeks ago (Jury still out possibly the light is too)
I love the sound!! Plain and simple> Sounds like a V-8 at idle. Purrs like a kitten at highway speeds. When I get my foot into it,she Howls like nothing else (combination CAI and Exhaust)Stainless steel is heavY. The muffler must weigh 30 lbs alone. I had to put on poly hangers to keep the pipe from swaying. Nailing down the pipe sway caused the header mid pipe connection to become a weak point. After blowing out 4 or 5 gaskets (2 bolt flange pattern. Should have used 3 bolt pattern) I put on STI motor mounts and the gasket seems safe. I have no idea on the Hp and any guess would be speculative at best. I wont put her on the Dyno untill I can adjust the stock ECU (Hello COBB).
Steve
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