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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Fri, Apr-13-2018, 10:30:31 PM   #41
Obioban
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Default Re: Supersprint Twin Pipe exhaust sect.2

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Originally Posted by C///M View Post
I can't tell if you were being serious. Only the CSL had the sodium filled exhaust valves. Standard M3's are not.

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https://www.dropbox.com/s/ajqqyi2d5k...odule.pdf?dl=0

Page 18.

Stock exhaust valves are sodium filled.
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Old Fri, Apr-13-2018, 10:44:03 PM   #42
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Default Re: Supersprint Twin Pipe exhaust sect.2

Can't wait. Was gonna have my fab guy do a 2.5" ID dual titanium Sec 2 but if this is available then why bother!

Plus I never liked my SS Un Res Sec 2.
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Old Fri, Apr-13-2018, 10:44:34 PM   #43
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Default Re: Supersprint Twin Pipe exhaust sect.2

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Originally Posted by Obioban View Post
https://www.dropbox.com/s/ajqqyi2d5k...odule.pdf?dl=0

Page 18.

Stock exhaust valves are sodium filled.
No shit. So the only difference with the CSL exhaust valves are the head geometry? I can't imagine it matters that much...

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Old Fri, Apr-13-2018, 10:58:52 PM   #44
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Default Re: Supersprint Twin Pipe exhaust sect.2

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Originally Posted by Dr M3an M3 View Post
Interesting. I did not know that. Would love to read more about that if you recall the source.

I thought a lot of the rasp also had to do with the dual piped exhaust design and the firing order of the motor (and thus exhaust pulses in each separate pipe -- which is why it's only heard at certain RPM (aka at certain pulse "frequencies" as the gases bounce off the walls of the 2 pipes)? Isn't that why the single exit exhausts on this car seem to eliminate that rasp entirely?

...I could totally be wrong on all this, which is why I am asking BTW.
I canít seem to find it again.

My memory is that it was a BMW made document.... but, canít be 100% confident in that without finding the source.

Certainly you can hide the rasp with exhaust mods.
(That said, the single exit solutions may hide it primarily by sheer volume)
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Old Fri, Apr-13-2018, 11:11:05 PM   #45
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Default Re: Supersprint Twin Pipe exhaust sect.2

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Originally Posted by nickpiper12 View Post
If I had to guess based off previous experiences, it will introduce some rasp back into play, but be slightly quieter.

Awesome offering Supersprint! If I didnít have a custom 3.5Ē section 2/muffler to support my 370whp S54 this would be on my list.
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Old Sat, Apr-14-2018, 02:42:07 AM   #46
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Default Re: Supersprint Twin Pipe exhaust sect.2

Ohhh sh*t... the blessings keep coming. I need a purchase date like yesterday lol. I thought homey was about to say "and we have decided not to build it" lol. This is good news indeed. My exhaust system will be done after this purchase.
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Old Sat, Apr-14-2018, 03:12:46 AM   #47
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Default Re: Supersprint Twin Pipe exhaust sect.2

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Originally Posted by Obioban View Post
From what Iíve read, the s54 rasp is due to the sodium filled exhaust valves
I always thought it was just some of the weirdness of the E46 exhaust design. Z3M and Z4M aren't nearly as raspy.
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Old Sat, Apr-14-2018, 03:16:48 AM   #48
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Default Re: Supersprint Twin Pipe exhaust sect.2

I'm buying this!
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Old Sat, Apr-14-2018, 03:30:47 AM   #49
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Default Re: Supersprint Twin Pipe exhaust sect.2

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Originally Posted by terraphantm View Post
I always thought it was just some of the weirdness of the E46 exhaust design. Z3M and Z4M aren't nearly as raspy.
I thought so too, but my S54 swapped wagon with OE CSL headers, OE Euro cats, non-res dual section 2, and 330i Supersprint Street muffler has barely any rasp.

Not sure what to think anymore.
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Old Sat, Apr-14-2018, 03:42:59 AM   #50
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Default Re: Supersprint Twin Pipe exhaust sect.2

So many x-pipes will be for sale...and I just bought a brand new SGT one, wish I would have saw this coming
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Discussing Supersprint Twin Pipe exhaust sect.2 in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)