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Old 01-11-2013, 06:02 PM   #1
Scooby Specialist
Member Sales Rating: (25)
Member#: 83818
Join Date: Mar 2005
Chapter/Region: SCIC
Location: Ventura County
Default Tanabe Concept G Catback (02-07) WRX/STi (long w/pics)

hey guys just wanted to give my review on the Tanabe Concept G catback for the 02-07 WRX/STi. this is a little different than the Concept G "Blue" turboback system in that it has a small resonator on the midpipe and also necks down to fit the 2.5" factory donut gasket properly. the "Blue" turboback version does not have the resonator and is full 3" throughout.

so here is what i had before- apexi N1 catback. what i did love about it was the aggressive upward and outward angle, and extremely large muffler canister. it was also not that loud at all and had no drone on the highway, making it a good daily exhaust setup. it also fit very well and had no fitment or quality issues in the past 3 years its been on the car.

but with the N1 dismounted its a little more apparent of why i wanted to change my setup. I've gone through Stage2 and also had a Tomei M7960 (TD06 20g) on the car and have now fitted a Blouch Dom3XTR to my car.

stock / tanabe concept g / apexi N1

as you can see the apexi N1 actually stays 2.5", maybe even less, more than halfway throughout the system.

apexi N1 bottom, tanabe above it. you can see the tanabe is 2.5" only at the flange, then immediately is 3" afterwards. the N1 is 2.5" for quite a ways....

further down the systems. as you can see the N1 only starts to be 3" just before the muffler

concept g fitted

at this angle it kind of reminds me of the blitz nur spec, just without the loudness.

as you can see its not super-jdm angled but not inline straight either. i think it looks great. fitment was spot on and the quality of the welds, piping, and canister are excellent.

i do realize that catback only gains might be negligible at the stage2 level, but after having a tomei and now a blouch turbo id want everything out of it

as far as sound. i would say its one notch down in volume than the apexi N1, yet, two or three notches up on tone, as the UEL pulses are very clear and not as muffled as they were with the N1. i was expecting it to be loud because it has a smaller diameter canister than the N1 but its pleasantly very quiet and livable. tanabe designs it to be a 93db and below exhaust.

im very happy with it so far, but have yet to hear it at WOT as i need a retune with my turbo setup. i went with it because i stumbled upon a great deal for one BNIB about half retail, i also wanted a nearly full 3" exhaust that still utilizes the oem donut gasket, and also something a little different.

this fit the bill
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Old 03-21-2013, 01:13 AM   #2
its byron
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Member Sales Rating: (4)
Member#: 345847
Join Date: Feb 2013
Chapter/Region: MWSOC
Location: Dayton
2004 WRX STI
WRB- 20PSI on 93oct


excellent write up. I was considering this exact same exhaust as well. Wish you would have made a small exhaust video.
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Old 03-25-2013, 05:19 AM   #3
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Join Date: Oct 2012
Chapter/Region: NWIC
Location: Nampa, ID
04 Forester XT 5sp


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Old 03-25-2013, 05:34 AM   #4
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Location: Ventura County

thanks guys. i do have a small vid on my iphone somewhere. its just a cold start and some light revs. it definitely would show how tame it is. i think its a great compromise between a quality, free flowing exhaust thats also very livable if you're worried about being too noisy all the time. there is no drone at any rpm, and even with aggressive revving it has no "brap" or rasp to it. it also does not have a provision to add a silencer in the tip as it would never necessitate needing it.

i have to admit though, after having it on for less than 10-15 miles (and it was brand new) i removed the tanabe concept g catback because it was simply too tame for me. i passed on the good deal to another forum member, and it has been since replaced with a tomei full titanium setup.

i will give a separate review of this exhaust later....or might just add onto this thread if its relevant.

Last edited by Mark2JZ; 03-25-2013 at 05:40 AM.
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