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      11-23-2012, 12:27 AM   #1
Krypptic
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S-Pipe for Z4M

Other than supersprint, does anyone make an s-pipe for the z4m?

I have supersprint x-pipe and powerloop mufflers installed already.

I have on order the fabspeed headers and evolve-r tune.

My shop is telling me they can fab them for about $400, but I would rather buy a set that are ready to go.

The supersprint are too expensive and no one keeps them in stock.

Another option, is that I can have the shop gut the existing s-pipe cats and go that route.

Any suggestions?
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      11-23-2012, 12:56 AM   #2
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I'm probably wrong but I think supersprint is your only option unless you want to do a custom S pipe. for reference I would also look up full motor Union I think it's called they did a custom exhaust for a carfrom the headers all the way back. is your intention to go fully catless?
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      11-23-2012, 12:58 AM   #3
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http://www.fluidmotorunion.com/archives/tag/z4m
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      11-23-2012, 01:10 AM   #4
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http://www.zpost.com/forums/showthre...419023&page=25
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      11-23-2012, 01:33 AM   #5
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lol i had no idea that was still going on.
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      11-23-2012, 01:58 AM   #6
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I hope you go for a catted/resonated S-pipe...because otherwise with the headers, you're going to get a RIDICULOUS amount of rasp
Been there, done that. Cool for volume/flow, but not rasp

Sold my SuperSprint unresonated S-pipe a while back and put the OE section1 back in to control the God-awful rasp.
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Last edited by mfanatic325; 11-23-2012 at 02:10 AM.
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      11-23-2012, 06:53 AM   #7
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Quote:
Originally Posted by mfanatic325 View Post
I hope you go for a catted/resonated S-pipe...because otherwise with the headers, you're going to get a RIDICULOUS amount of rasp
Been there, done that. Cool for volume/flow, but not rasp

Sold my SuperSprint unresonated S-pipe a while back and put the OE section1 back in to control the God-awful rasp.
How do you find the rasp now?
I'm doing headers in the spring & that's my one concern.
I don't mind a bit of drone, but I hate rasp.
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      11-23-2012, 09:28 AM   #8
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Quote:
Originally Posted by JeffchaPz View Post
I've seen that thread, but its been going for 2 years and I still see no ETA as well.

No pricing either?
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      11-23-2012, 09:49 AM   #9
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Quote:
Originally Posted by mfanatic325 View Post
I hope you go for a catted/resonated S-pipe...because otherwise with the headers, you're going to get a RIDICULOUS amount of rasp
Been there, done that. Cool for volume/flow, but not rasp

Sold my SuperSprint unresonated S-pipe a while back and put the OE section1 back in to control the God-awful rasp.
Do you have a clip of how your car sounded? I have tried listening to videos on you tube to see how it will sound but only found one z4m fully catless, and it sounded great. Thing is, it didn't mention if resonators were used.
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      11-23-2012, 11:59 AM   #10
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Use resonators if going uncharted. Like Mfanatic said, rasp is awful w/o.

Aero turbine resinators, or similar, in a custom section S pipe section would work.

You might want to try searching E46 M3 forums for other ideas on this (larger base/volume of cars).
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      11-23-2012, 04:57 PM   #11
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I have CSL headers, I fabricated a custom catless S pipe out of a E46 M3 section 1, OEM X-pipe and OEM mufflers.

It's not really loud, no drone but it's rasp festival. I kinda like it. The only thing with a catless car : it smells!! You can't stay in traffic with windows open. I think I will put OEM S pipe back on the car with my BMS X-pipe.

If you want to do a custom S -Pipe with no rasp, you can buy Aero Turbine resonator AR-20 or AR-25. A lot of guys use them on E46 M3.

http://www.custom-performance.net/pr...idCategory=253
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      11-23-2012, 04:59 PM   #12
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I will also make a custom S Pipe with 2 resonators from an E46 M3 soon withthe o2 and EGT sensors bungs in it. I will post pics when finished.
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      11-23-2012, 05:30 PM   #13
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In the same boat. Have CSL headers installed and looking for an S pipe. Picking up the RE X pipe and have RPi's installed. Will DKF's S pipe work for us?
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      11-23-2012, 09:03 PM   #14
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Quote:
Originally Posted by inTgr8r View Post
How do you find the rasp now?
I'm doing headers in the spring & that's my one concern.
I don't mind a bit of drone, but I hate rasp.
With the OE section1 back in, the car quieted down quite a bit; very noticeable difference. And there was approximately a 30% reduction in rasp
I recall that when I had everything free-flowing, I registered a maximum of 106dB @ the track, blowing by the sound check hut on purpose
Quote:
Originally Posted by Krypptic View Post
Do you have a clip of how your car sounded? I have tried listening to videos on you tube to see how it will sound but only found one z4m fully catless, and it sounded great. Thing is, it didn't mention if resonators were used.
I'll try to find a vid and post it up here. Look for an edit soon.

edit: can you view this vid? If so, just listen for the cold startup at the very beginning, and then if you can, skip to the end for a 1st gear redline through a small underpass (at 7:13 to be exact):
https://www.facebook.com/photo.php?v=10150965087107856

Also, from a huge "Exhaust 'Fest" we had locally, here is a compilation of many different setups. In the following video, my car's recordings can be found at 1:16 (startup + mid-rpm revs), 6:00 (soft pull), and 8:16 (hard pull).
http://www.youtube.com/watch?feature...&v=Ar78IVHcbRs


In both videos linked above, my setups were the same:
- JVT/"eBay" headers (a.k.a. SuperSprint v1 knock-offs)
- OE section1
- SuperSprint unresonated X-pipe
- SuperSprint race muffler cannisters

Hope this helps!
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Last edited by mfanatic325; 11-23-2012 at 10:09 PM.
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      11-23-2012, 11:46 PM   #15
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A custom S-pipe with Aero Turbine resonators won't sound raspy, will it? I think that what e46 m3 "rasp pipes" use to eliminate rasp actually
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      11-24-2012, 01:06 AM   #16
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Quote:
Originally Posted by ZStig View Post
A custom S-pipe with Aero Turbine resonators won't sound raspy, will it? I think that what e46 m3 "rasp pipes" use to eliminate rasp actually
It should be pretty nice with the Aero resonators put in
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      11-25-2012, 02:41 PM   #17
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i have a custom fabbed section 1 with some small resonators and it keeps the rasp down quite a bit.

i have the fabspeed headers, RE x-pipe and arqray mufflers.

it was 400 for the section 1 pipe if that helps.
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      11-26-2012, 09:42 PM   #18
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Quote:
Originally Posted by ZStig View Post
A custom S-pipe with Aero Turbine resonators won't sound raspy, will it? I think that what e46 m3 "rasp pipes" use to eliminate rasp actually
Dave has only one large aero turbine resonator in his system, nothing else (no cats). No rasp at all.
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      11-26-2012, 10:50 PM   #19
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Quote:
Originally Posted by Gtfour View Post
I have CSL headers, I fabricated a custom catless S pipe out of a E46 M3 section 1, OEM X-pipe and OEM mufflers.

It's not really loud, no drone but it's rasp festival. I kinda like it. The only thing with a catless car : it smells!! You can't stay in traffic with windows open. I think I will put OEM S pipe back on the car with my BMS X-pipe.

If you want to do a custom S -Pipe with no rasp, you can buy Aero Turbine resonator AR-20 or AR-25. A lot of guys use them on E46 M3.

http://www.custom-performance.net/pr...idCategory=253
How do you know which size to get? I checked the m3 forum and some used the ar20 others the ar25. The difference being 2 inch v. 2.5 inch.

I can do this one of two ways, have a whole pipe fabbed, or just cutout the cat and replace it with resonator. Any suggestions?
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      11-26-2012, 10:59 PM   #20
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Quote:
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Quote:
Originally Posted by ZStig View Post
A custom S-pipe with Aero Turbine resonators won't sound raspy, will it? I think that what e46 m3 "rasp pipes" use to eliminate rasp actually
Dave has only one large aero turbine resonator in his system, nothing else (no cats). No rasp at all.
I like that idea. Even less weight
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      11-27-2012, 10:49 AM   #21
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Quote:
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I like that idea. Even less weight
to dig up an old thread:

http://www.zpost.com/forums/showthread.php?t=646775

A diagram to show what it looks like (Daves setup) he now has no cats at all, i believe in the videos in the thread he still has US headers. He now has Euros, the Sound is different and there is still no drone really. Much more rowdy sounding now!
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      11-28-2012, 04:47 PM   #22
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Quote:
Originally Posted by habitat412
In the same boat. Have CSL headers installed and looking for an S pipe. Picking up the RE X pipe and have RPi's installed. Will DKF's S pipe work for us?
Yes they will have a s pipe with cats proto on forum members car now no problems. We are waiting to hear from vendor. Should have some information soon. Please PM me on questions.
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