Difference between 06/07 STI and GD Spec C catback?
 

As per title.... I have been reading around and it seems the 06/07 STI catback is the same as all other GD (2.0L) models and is close to 2.25" (see this thread on rexnet: [URL="http://www.rexnet.com.au/forum/index.php?showtopic=123911&hl=2\.25"][/URL][url]http://www.rexnet.com.au/forum/index.php?showtopic=123911&hl=2\.25[/url]). Anyone know for sure if the 06/07 is the same?

Apparently the Spec C catback is 2.5", can anyone confirm/deny this?

Anyone know anything in more detail about the internal structure/layout of these two mufflers?

[QUOTE=Andy!;468855]As per title.... I have been reading around and it seems the 06/07 STI catback is the same as all other GD (2.0L) models and is close to 2.25" (see this thread on rexnet: [URL="http://www.rexnet.com.au/forum/index.php?showtopic=123911&hl=2\.25"][/URL][url]http://www.rexnet.com.au/forum/index.php?showtopic=123911&hl=2\.25[/url]). Anyone know for sure if the 06/07 is the same?

Apparently the Spec C catback is 2.5", can anyone confirm/deny this?

Anyone know anything in more detail about the internal structure/layout of these two mufflers?[/QUOTE]
Pretty sure the 06/07 ADM STI is 2.5" and I would be surprised if the Spec C is any different.

the Spec C dump pipe is certainly different, but I was under the impression the catback would be the same

2.5L gets bigger exhaust?

If your talking about the STi cannon style exhausts then Spec C and S204 muffler are basically the same except materials and I can confirm the flange and piping diameter is 2.5.

However when Ramon cut open a Genome exhaust it had internal down
sizing so the only real way to find out would be cut it open. :eek:

Saying that the Spec C and S204/RA-R mufflers are not exactly restrictive
on making power and certainly flow better than a STD STi exhaust.

The 06/07 has a 2.5 inch mid pipe and a 2.25 inch diff back. (i bought naulis old diff back). Some Sti mufflers had a 2.5 inch diff back section, i have the 2.5 inch version on my xt, but i'm not sure what model it's off. I was thinking maybe a JDM Sti.
I think the spec c has a stainless version of the titanium s204 cannon muffler.
Here's one for sale.
[url]http://www.rexnet.com.au/forum/index.php?showtopic=120752[/url]

I know thats why im asking the questions :)
What about noise I have heard genome catback, from about 2km away :) they are not exactly quiet, are these very similar to that or more like stock?

By the look of it, the spec C appears to be like a cannon ie. straight through design, correct or are they baffled design like the normal STI

I've had a Genome and the are quiet as a stock system when cruising
but mean and loud on WOT.

Why such a concern if it's baffled or straight through, the fact is
they flow and sound better than a stock STi exhaust?

If you want a super dooper free flowing muffler then go after market
or get a custom one made by Norm Butler.

or a varex.

I was more just interested in the internal structure of the muffler.

Im basically after a super quiet setup but want as little restriction as possible, I know anything quiet will most likely be more restrictive (especially top end) but I can deal with small losses to keep the car quiet.

and I dont mean quiet as in compared to common aftermarket drain pipe exhuasts, I mean quiet as in factory exhuast quiet.

Genome and Spec C would give you a stockish sound level when
normal driving then on WOT would let it roar!!!

Also depends if your only changing the diff back part as obviously
if you change the dump and centre pipe to larger diameter it's going
to make them louder.

Just get the Spec C one and try it out, if it's not to your liking someone
will buy it off you for sure.

are you talking standard spec c exhaust or optional upgrade spec c exhaust (genuine subaru)?

because,

the standard exhaust on a gdb spec c is the same as on a standard exhaust on a JDM gdb sti (of the same year)

From what I gathered he's looking at the "Cannon" style Spec C
optioned one.

Correct the one in the link earlier is the one I was looking at.

Are the JDM GDB STI catbacks different to the ADM?

[QUOTE=Andy!;469058]Correct the one in the link earlier is the one I was looking at.

Are the JDM GDB STI catbacks different to the ADM?[/QUOTE]

Nope the Stock JDM STi exhausts are the same as the ADM ones, it's
only the optoined exhausts such as Genome, STi sports and the S20x
and RA-R ones that are the cannon type.

So Gay Andrew... "I want my car to sound like a Honda"... Just get a HKS Silent again... or at least a proper exhaust... Its gonna sound so crap...

Those exhausts won't make it sound like a so called "Honda" unless
he goes with equal length headers.

Equal length sounds Porn!!! :D

[QUOTE=Jimmy S;469065]So Gay Andrew... "I want my car to sound like a Honda"... Just get a HKS Silent again... or at least a proper exhaust... Its gonna sound so crap...[/QUOTE]

Shut it Jimmy, I dont want it to sound like a honda...I dont want it to sound at all.

I am yet to hear an exhaust on a subaru sound decent through a stock subaru diff-back.. and id say fairly confidently, its going be audible once you change the dump and centrepipes...

I just reckon you're gonna do all this "research" and spend $$s on a stock muffler that your going to drive around with for a few weeks with a proper dump/centrepipe and then turn around and say:

"Big brother, you were 100% right, I don't know why I didn't listen to you in the first place? This is possibly the gayest thing in the world and I can't believe I paid $$s for it!"

And then you're going to go and buy a reputable aftermarket "quiet" system which combined with a varex will be a way better option...

HAHA family dispute :D

Andy as said before just buy the Spec C cannon and if you don't like it then
it should be quite easy to on sell because of what it is and try something
else.

I do agree with the big bro kinda as stock STi ones do sound shit but the
STi optioned cannon ones sound completely different. :D