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Old 12-12-2008, 08:22 AM   #1
sittinsideways
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Default which is better

got an 07 impreza and i want a full exhaust. now should i buy a muffler and take it to a shop and have a custom pipe done on it or should i was the couple hundered bucks and buy a full cat back from a company. does any one know if there are a diff in hp gains or what not. im not lookin for hp really just that nice boxer rumble
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Old 12-12-2008, 09:35 AM   #2
kero
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I know it's a little pricey but stromung CBE is a great choice for our cars. I have a full single tip XA stromung CBE on my 07 wagon and love it.

My question, are you also considering headers & HFC as well or only CBE.

Reaason: With a stromung CBE or other company CBE your car will sound better but you still won't have the boxer burble/rumble.

For this you will need UEL header setup and a HFC or used 05 or earlier catpipe (which are hard to find used)

For UEL header setup, you can go borla or ebay knockoffs, HFC (high flow cat) you can go with stromung or random tech (random tech is super pricey though), some ppl have a catpipe fabbed from a local shop. You will need to extend the 2nd 02 wire, you can get a kit from kasper and also for good measure an 02 spacer from rallitek to help with the code you car might throw.
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Old 12-12-2008, 10:09 AM   #3
sittinsideways
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defiently planned on purchasing headers. currently im just tryin to do my resarch on everything see what route i should go
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Old 12-12-2008, 10:09 AM   #4
sittinsideways
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Do the impreza's not have uel headers on them then?
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Old 12-12-2008, 10:36 AM   #5
joecerv
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MY02 thru MY05 have UEL headers.
The MY06 and MY07 have EL headers.

From what I have heard if you go for the UEL headers on the MY06-07 you will lose some power.
Someone else please confirm if my last statetemt is correct.
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Old 12-12-2008, 11:09 AM   #6
Kevin Thomas
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Quote:
Originally Posted by sittinsideways View Post
got an 07 impreza and i want a full exhaust. now should i buy a muffler and take it to a shop and have a custom pipe done on it or should i was the couple hundered bucks and buy a full cat back from a company.
Buy a muffler and take it to a shop and have a custom pipe done on it.


Quote:
Originally Posted by sittinsideways View Post
does any one know if there are a diff in hp gains or what not. im not lookin for hp really just that nice boxer rumble
With just a muffler, 1-3hp gains with a custom job. Not anything to write home about. More gains with an intake. The 'nice boxer rumble' will be more noticable or pronounced with an unequal length header like the Borla. Good luck!
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Old 12-12-2008, 01:13 PM   #7
kero
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The power lose of UEL's is so little you probably wouldn't really notice the loss of power in every day driving, why worry though, our NA's don't have big number outputs to begin with so a few HP loss is not going to make or break anything in terms of perfomance.

Age old debate but I feel the boxer rumble is worth a tad power loss, it's what makes a suby boxer in my mind.

Don't forget, if you do a HFC that kinda helps keep the power loss to a minimum as you are freeing up the exhaust flow.
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Old 12-12-2008, 01:48 PM   #8
sittinsideways
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thanks for the replys everyone
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Old 12-12-2008, 01:58 PM   #9
sittinsideways
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also can i buy an uel manifold or is there specific. i seen on the forums the grouppe s for like 346$ but in the smaller writing it says at the end it mentions a turbod car not a non turbo?
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Old 12-12-2008, 02:05 PM   #10
Kevin Thomas
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Quote:
Originally Posted by kero View Post
The power lose of UEL's is so little you probably wouldn't really notice the loss of power in every day driving, why worry though,
Where is this info documented? The last info on this I remember is from the Borlas being compared to .....eh..er...uhm....can't remember the equal length header that was tested. The equal length made more power than the Borlas but the Borlas made more power than stock. It was a difference of 8whp+ for the Borlas and around 14-15whp for the other brand (Sorry...slipping my mind).

There may have been a ton of new information since then but I have not been around these parts for a while.
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Old 12-12-2008, 02:29 PM   #11
Vizzionz
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Quote:
Originally Posted by kero View Post
I know it's a little pricey but stromung CBE is a great choice for our cars. I have a full single tip XA stromung CBE on my 07 wagon and love it.

My question, are you also considering headers & HFC as well or only CBE.

Reaason: With a stromung CBE or other company CBE your car will sound better but you still won't have the boxer burble/rumble.

For this you will need UEL header setup and a HFC or used 05 or earlier catpipe (which are hard to find used)

For UEL header setup, you can go borla or ebay knockoffs, HFC (high flow cat) you can go with stromung or random tech (random tech is super pricey though), some ppl have a catpipe fabbed from a local shop. You will need to extend the 2nd 02 wire, you can get a kit from kasper and also for good measure an 02 spacer from rallitek to help with the code you car might throw.

WOWSERS! this is completely wrong. i have stated this millions of times in other posts. REMOVE THE 2ND "NON-FUNCTIONAL" CAT [AKA RESINATOR] FOR THAT 'BOXER RUMBLE'.

i have a full custom header back exhaust on my 2007 2.5i and it has NOT thrown any CEL's & i'm running catless!
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