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Discussion Starter · #1 ·
So I hate to post something about a topic that is frequently discussed, however I feel this is pertinent info that I have not seen discussed as I searched for it before I did this....

I had on my car the OEM mazdaspeed3 exhaust welded up to my car, and had one of the original cats removed. This left me with the catalytic converter in the headers, two resonators and the MS3 OEM "muffler." I've had this on my car for about a year now, and have been in love with the way it sounds outside the car, until now. My friend recently purchased a Corksport turbo back exhaust to put on his MS3. I LOOOVE the sound of it. Mostly because of the lack of in cabin noise, yet it sounds noticeably loud outside but not disgusting sounding. Their exhaust setup is no cats, and two resonators in 3" piping and NO muffler. So I had a epiphany...

Today I went to my local muffler shop and had my exhaust modified. I had them cut out the OEM MS3 "muffler" and replace it with straight pipe, leaving my setup as 1 cat and 2 resonators with 2.5" piping. This is my attempt to replicate the MS3 corksport sound as best as possible. After all was done the car was started up.... No sound difference... huh? The guy revved it a little.... NOOOOW we're talking, a beautiful sound. I was already happy. I got in the car and started it myself, and to my amazement my attempt at removing the nasty burring and resonating inside the cabin was highly successful!!

So, the moral of the story... If you like your MS3 exhaust setup because it is cheap yet do not like the interior resonation remove the "muffler." The reason I keep putting "muffler" in quotes, is because it's basically designed just like a resonator. This design retains all the noise under the car instead of letting it escape out the rear. Yes the exhaust tone is louder when you get on it, but cruising it is dead silent at any RPM's and there's no resonation. If the total noise outside is too much for you, I would definitely suggest a true muffler but I am happy with how it sounds. If you have any questions feel free to ask.

Here is a video of the MS3 corksport turbo back exhaust. This is what I was attempting to replicate and believe it sounds very close to it except not as loud because I have 1 cat still.

http://www.youtube.com/watch?v=2vwuAAK_bPo#

This is my video I just made of the exhaust. Keep in mind during the interior video, that I have all three motor mounts, so there is some extra noise from them. This was also done with a Samsung Instinct cell phone, so be open minded about the sound until you hear it in person.



Picture of the axle back setup:
 

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ok dude can we have a pic of the setup pleeez...asas...i just got my MS3 exhaust and wana put it on thurs....but myn came without the muffler thats by the exhaust tip(MS3 tip)...so basically i got that big muffler thats just before the spare wheel when istalled or rather just before the rear spring....PIC PLZ :) im getting excited if it gona sound like that
 

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Discussion Starter · #3 ·
**OP updated with a picture of the axle back setup due to multiple requests...**

I am also goin out right now to do a sound clip... hopefully the microphone in the new samsung instinct phone isn't too horrible. lol
 

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ok i already bought myn without that last muffler LOL wat engine u have there....come now im waiting for the sound clip bru ;) HURRY
 

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Not gonna lie dude, this def. makes me want to do the same to mine. I'll def. consider it after I hear your exhaust at the Ocala meet. Great post BTW. It will def. be helpful to a lot of members :)
 

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Discussion Starter · #6 ·
2.3L...

Lemme run outside and get a sound clip for you sheesh lol I wasn't able to get a good one because of the wind earlier.
 

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Discussion Starter · #8 ·
[quote author=coondogg link=topic=139857.msg3015205#msg3015205 date=1237944732]
I've heard the MS3 exhaust on both a sedan and the hatch and there is a lot more drone in the hatchback. A LOT more...
[/quote]
I believe that, just because the trunk in the sedan is not connected to the rest of the cabin.
 

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i thought it was 2.5". when i got mines and measured it, it was 2.5" :dunno:
 

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Discussion Starter · #13 ·
The OEM MS3 exhaust gradually gets larger... starts at 2.5" and expands to 3" at the tip. The piping I've had put in the exhaust to delete the cat and muffler are 2.25" pieces of pipe. Neither of them are the same size as the OEM piping.
 

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[quote author=z00mz00m3 link=topic=139857.msg3071573#msg3071573 date=1240246174]
The OEM MS3 exhaust gradually gets larger... starts at 2.5" and expands to 3" at the tip. The piping I've had put in the exhaust to delete the cat and muffler are 2.25" pieces of pipe. Neither of them are the same size as the OEM piping.
[/quote]



this is the flange and a little piping that was cut off of mine. If what you say about the piping getting larget as you go to the back, well, it starts at 2.25" for sure.
 
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