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Old 11-26-2012, 09:40 PM   #1
travisamorgan
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Question 2007 2.5i exhaust with no drone?

i got a totally stock 2.5i and want to do an exhaust upgrade (cat-back). I have looked around at the forums and now know i need 2.25" or 2.5" at the most piping. I would like something that doesnt drone. I drive 6 hours from home to college and its mostly interstate and i only make the trip every 6 weeks but do a lot of 55mph driving both at home and college. I dont want a droning exhaust. I plan to do moe later but right now i dont have the money for uels or to change the cat. I plan to add a hybrid intake soon also but want to know what exhaust to go with?
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Old 11-26-2012, 11:24 PM   #2
Steve2.5i
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Quote:
Originally Posted by travisamorgan
i got a totally stock 2.5i and want to do an exhaust upgrade (cat-back). I have looked around at the forums and now know i need 2.25" or 2.5" at the most piping. I would like something that doesnt drone. I drive 6 hours from home to college and its mostly interstate and i only make the trip every 6 weeks but do a lot of 55mph driving both at home and college. I dont want a droning exhaust. I plan to do moe later but right now i dont have the money for uels or to change the cat. I plan to add a hybrid intake soon also but want to know what exhaust to go with?
What's ur budget?
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Old 11-27-2012, 02:10 AM   #3
Lgs Suby Qs
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I've a similar question for our 2008 Impreza 2.5i with stock split dual exhaust

Looking for something with more throaty rumble if that's possible with exhaust change alone
Don't really want to loose low end torque
No other plans at the present time for other upgrades, unless it would be a tune if that was advisable.

I've already read lots of threads, listened to many You Tube videos & looked at variety of aftermarket systems (like Borla)

Local Craigslist seller has '08 STI complete take-off mid-pipe back for $50, but it has dual tips on each side so do not think it will match up with stock lower fascia which is molded for single tips
Also read where mid-pipe has to be lengthen & may loose some low end torque due to larger diameter tubing on STI

As to budget question, I'm uncertain because I really have no idea of what it may cost.
If I could find a used aftermarket system or factory take off that would work, then that would likely be most affordable route.

Suggestions?

Thanks!
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Old 11-27-2012, 04:00 AM   #4
Steve2.5i
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Quote:
Originally Posted by Lgs Suby Qs
I've a similar question for our 2008 Impreza 2.5i with stock split dual exhaust

Looking for something with more throaty rumble if that's possible with exhaust change alone
Don't really want to loose low end torque
No other plans at the present time for other upgrades, unless it would be a tune if that was advisable.

I've already read lots of threads, listened to many You Tube videos & looked at variety of aftermarket systems (like Borla)

Local Craigslist seller has '08 STI complete take-off mid-pipe back for $50, but it has dual tips on each side so do not think it will match up with stock lower fascia which is molded for single tips
Also read where mid-pipe has to be lengthen & may loose some low end torque due to larger diameter tubing on STI

As to budget question, I'm uncertain because I really have no idea of what it may cost.
If I could find a used aftermarket system or factory take off that would work, then that would likely be most affordable route.

Suggestions?

Thanks!
There is no rumble to be had without uel headers. No need for a tune. Stick to 2.25 or no more then 2.5 for ur piping. Surf the classifieds here on nasioc. If I could go back, the route I would have taken is visiting my local exhaust shop and have them custom Fab me one (cheaper then my catback). Wrx stock catbacks pop up every now n will bolt right up. You could also look into a axle back

Last edited by Steve2.5i; 11-27-2012 at 04:07 AM.
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Old 11-27-2012, 11:24 AM   #5
travisamorgan
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Quote:
Originally Posted by Steve2.5i View Post
What's ur budget?
im not sure yet. i was thinking about removing the exhaust resonator but im not sure how that would sound (ive heard it sounds raspy but not entirely sure what that means at higher rpm and what it would sound like totally). ive looked at stromung, are there any other systems that are 2.25" or 2.5" tubing most are 3". i dont have the money at this exact moment but what to know what to look for when i do.
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Old 11-27-2012, 02:14 PM   #6
Steve2.5i
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Quote:
Originally Posted by travisamorgan

im not sure yet. i was thinking about removing the exhaust resonator but im not sure how that would sound (ive heard it sounds raspy but not entirely sure what that means at higher rpm and what it would sound like totally). ive looked at stromung, are there any other systems that are 2.25" or 2.5" tubing most are 3". i dont have the money at this exact moment but what to know what to look for when i do.
My borla catback has no resonator, for the first 5-10mins while the engine is cold there's massive rasp. Once its warmed up it goes away. Although some rasp shows up at higher rpms. Magnaflow makes a 2.5 inch piping. Borla makes one just for the 2.5i. Perrin makes one, AVO, basically all catback systems for wrx will bolt up. Just look for the 2.5 diameter ones not 3 and ur solid.
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Old 11-27-2012, 02:44 PM   #7
travisamorgan
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do any of those drone? thats the only thing im worried about driving 6 hours and a solid drone would drive me nuts haha
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Old 11-27-2012, 03:23 PM   #8
Steve2.5i
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Quote:
Originally Posted by travisamorgan
do any of those drone? thats the only thing im worried about driving 6 hours and a solid drone would drive me nuts haha
Slap an aftermarket resonator which will eliminate most of the drone. I put on a vibrant performance bottle style resonator and it stopped all the rasp/all the drone as well. 18inch total length did the trick for me.
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Old 11-27-2012, 04:07 PM   #9
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I've been really happy with the increase of engine noise that was gained by changing the motor and transmission mounts to group N mounts; nice throaty sound transmitted into the cabin. Plus you also get better throttle response, and a noticeable decrease in the stop-and-go traffic bucking. Could be an option.
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Old 11-28-2012, 11:04 PM   #10
Eyedoc Orlando
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I have a 2.5i Borla Catback still for sale if you're interested. I put 8000 miles on it and removed it because the noise was a little high for me, but for most people it's "just right" - PM or email me if interested in it. It has a resonator and is full stainless steel, sounded great but I decided I just like my car quiet now that I'm older.
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Old 11-29-2012, 01:26 AM   #11
travisamorgan
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any other axle backs with a 2.5" pipe that will work even from other yyears besides the stromung?
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Old 11-29-2012, 02:00 AM   #12
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I'm gonna recommend Stromung. Its a little pricey for the axle-back but I had a stromung intermediate pipe (No resonator) and a dual tip axle-back and it sounds great. It has a little bit of rasp since there's no resonator but its only when its cold and at the very high RPMs. It's nothing that's ever bothered me.

Here's a quick video of mine:
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Old 11-29-2012, 08:51 PM   #13
klaus_b2
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i would go intake first. i got a catback first and didnt really notice anything but then got the injen cai and actually noticed a difference. if i wouldve known i wouldve got the intake first, exhaust 2nd. if it were me, i would wait til you could afford uel headers as well. just didnt like the rasp. i think tsudo makes a header+cat for 350? plus another 350 for catback. cheaper than most set ups
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Old 11-29-2012, 09:14 PM   #14
Brettaleckson
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Which TBE is better performing, perrin or txs, I like the sound of both so that's not an issue. Thanks for the help!
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Old 12-01-2012, 12:32 AM   #15
travisamorgan
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ok decided ill fork out the money to do stromung
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Old 12-01-2012, 02:46 AM   #16
Bababou
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Look into getting a pipe bent at a local shop its going to be the the best price. Have them make it from the flex joint back and add a short 18 inch thrush style resonator. No rasp and good sound. The borla kit is good, I had it on my car for a while but to me it sounded to much like a honda.
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Old 12-24-2012, 05:41 PM   #17
mstngturk10
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Does a stock STI exhaust bolt up just the same as the WRX? Is the sound of the STI any different than WRX as far as sound goes when you bolt it on?
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Old 12-24-2012, 06:02 PM   #18
mdungelman
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You're really better off just going with an axleback that'll bolt up. Any 2.5" that bolts up to a 02-07 WRX will work. The STI axleback doesn't really do much besides have a shiny tip. I had two Stromung's and a Prodrive through the ownership of my 06 2.5i. They both sounded great.
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Old 12-29-2012, 12:50 PM   #19
kenjsylvia
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Default I'm interested...

Quote:
Originally Posted by Eyedoc Orlando View Post
I have a 2.5i Borla Catback still for sale if you're interested. I put 8000 miles on it and removed it because the noise was a little high for me, but for most people it's "just right" - PM or email me if interested in it. It has a resonator and is full stainless steel, sounded great but I decided I just like my car quiet now that I'm older.
I have an 09 Sedan, dual exhaust, Impreza. I'd like to get the borla catback, message or email me if you still have it... NM... I just noticed that we have different model years, and I can't figure out how to delete my first post.

Last edited by kenjsylvia; 12-29-2012 at 12:55 PM. Reason: I didn't notice we have different MY
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