2 litre non turbo impreza exhaust modification

[wreckd]

Hello everyone. I have got a 2 litre non turbo impreza (2001 model). I am wanting to ge the subaru sound. Will removing the cat give the subaru rumble. I dont want it to be loud.

What are you experiences? What about leaving the cat in but putting a coby in?

[nztintin]

N\A subarus don't get the "subaru sound" as far as i know. they sound more like hondas (or at least shales does, only modified N\A i've heard)

[Guest boostcut]

dont put a coby on it. theyre shitty, old resonators that do nothing.

get a proper dual chamber "v8 style" muffler and it will sound average. they cackle pretty bad if you take the cat converter out.

[wreckd]

I have also heard that people say removing catalutic convertor makes better fuel economy. Is this true?

[Guest boostcut]

probably if its blocked. if its working well, then no, it wont change alot.

[CUDDAS]

If you do remove the cat replace it with a resonator or you will get that horrible crackle mensioned,

you could get a well packed rear muffler, not the tinny thin canon straight through type but a chambered type rear muffler to get a decent note from,

i have found that NA subaru's can be really loud with the simple bigbore free flow approach

[wreckd]

is a resonator same as a coby? or is there a difference?

[Guest boostcut]

get coby out of your head mate, theyre junk. haha

but yes theyre an over priced resonator, you get better resonators at repco for 40 bucks.

[Shale]

I HEARD MY NAME.

...

Yeah, get rid of the thoughts of a Coby. They're poos. What you want is at worst an RPS, at best a proper Japanese name brand muffler. HKS, Fujitsubo, 5Zigen, you name it.

The N/As have nasty headers; the turbo ones go around the front of the sump and have one part significantly longer than the other, THAT son is what makes the burble The N/As either have completely tuned headers, a skodey Y-pipe...or god-knows-what.

Being a 2001 model I'll assume it's DOHC. If so, those tend to sound flat as a pancake if not slightly raspy. The example Tintin gave, my car, has a big ugly rasp on it because it's got SOHC heads into a slightly uneven Y-pipe. Sounds kinda weird.

TOO LONG DIDN'T READ:

- If you want the Subaru rumble, you need to put turbo headers on. They need modification to adequately fit an N/A from what I've seen. You also want a proper exhaust, NOT a Coby: get a 2.25" or 2.5" midpipe made up. To have a QUIET burble, get an STi muffler (version 7/8/9/10 will fit your car well) fitted to the midpipe at the same time. You'll need a new catpipe from the headers, as the turbo ones aren't a straight bolt-on...you are missing the turbo.

Edit: Just as a disclaimer. Personally that's far too much work... save up for a WRX is the best answer.

[petrolheadjman]

Well i have an N/A and its DOHC and does actually have a slight rumble.

I just bought a zerosports C-pipe (muffler) and sounds really nice.

[Simon C]

I have a set of V7 STi unequal length headers and uppipe if you're interested. I've twisted some of the heatshields a bit, but I'm sure you can just retwist them and make them fit. Don't ever plan on reusing them, so they might as well get used by someone.

[Joker]

lol all that name brand stuff

cheep cannon

thrash it

[nztintin]

remove cats, factory rear muffler = no performance loss. did that on my forester and have dyno sheets to prove

[Flat4]

 petrolheadjman said:

Well i have an N/A and its DOHC and does actually have a slight rumble.

I just bought a zerosports C-pipe (muffler) and sounds really nice.

+1

I have a TS-R (DOHC N/A) and it also has a bit of a rumble. Mine has a 2.25" cat back exhaust with a chambered resonator and Fujitsubo muffler.

It will never sound like a turbo subaru without proper unequal length headers though.

[Flat4]

 wreckd']

I am wanting to ge the subaru sound. Will removing the cat give the subaru rumble. I dont want it to be loud.

Removing the cat will only make it sound louder and raspier (unless you swap it out for a resonator like Cuddas said, still won't give it the rumble tho)

[quote name='wreckd said:

What are you experiences? What about leaving the cat in but putting a coby in?

Putting a coby in won't do much by itself. I reckon your best bet would be to hunt around for a nice muffler. Chambered ones sound nice on N/A's, and you also might be better off going for a mild steel one rather than stainless (will help prevent it from sounding raspy).

If you're prepared to spend a bit more ($200-$250) then you could do what I did and get a cat back exhaust made up with a decent resonator. I'll try and take a video of mine and upload it over the wkend if I have some free time

[sultan]

 Shale said:

Edit: Just as a disclaimer. Personally that's far too much work... save up for a WRX is the best answer.

that's the best piece of advice i've ever heard given to some one wanting to make their n/a subaru cooler/faster/better. how blatantly ironic

[Shale]

Sh!t man, you're even more behind the times than I thought you were. CAN OF V. CATCH UP. :

[sultan]

i remember pages and pages of you arguing with an entire forum full of people trying to justify your copious expenses making your n/a awesome while they told you to simply buy a wrx. the best point i remember you trying to make was how that n/a was actually better than turbo due to having a flat response and no "lag".

[Shale]

I don't like repeating myself... lurk moar.