Mix/Match of Possible Mods

jagman · 09-18-2012, 12:38 AM

It has been determined that I have the Akrapovic Slip On exhaust and the resonator was removed by the previous owner of my 08 E92 M3. I want to get a full exhaust. I first thought it best to get the Akrapovic x-pipe mid pipe but it only comes with 100 cell cats and removes the primary cats. Being in CA that is asking for trouble. IND recommended the Challenge Street X-Pipe since it keeps the primary cat and thus would not fail obdII testing. Since CA might lose the visual inspection in 2014 that would be a big deal.

So, do any of you know what it will sound like if I get the Challenge Street X-Pipe and couple it to the Akrapovic Slip On exhaust?

For intake mod I was thinking about the Dinan intake or the MS intake. Excluding appearance... is one better than the other?

I am also contemplating upgrading the pulley... probably the one by ESS. Is it worth the cost and effort?

Lastly, do you guys think the ESS tune for the Akrapovic Evolution exhaust with the cold start mod would sound good/better than no flash? I hate the cold start drone I have with the Akrapovic Slip On.

THE TECH · 09-18-2012, 07:59 AM

All of your questions aside from the subjectiveness of the sound of the exhaust can be found with a search of the forum.

jagman · 09-18-2012, 11:02 PM

I spent about 6 hours searching m3post as well as Google and so far I only see one person with the Akrapovic Slip On and the Challenge Street X-Pipe. I asked him about it but have yet to receive a reply. I also figured the ESS tune for the Akrapovic Evolution exhaust might not sound as good with the Akrapovic Slip On/ Challenge Street X-Pipe combo since it wasn't designed specifically for the mixed combo. I was hoping for a comment from someone who has heard both. That's nowhere on the web. I'll keep searching for the rest.

tom @ eas · 09-18-2012, 11:32 PM

Quote:

Originally Posted by jagman

It has been determined that I have the Akrapovic Slip On exhaust and the resonator was removed by the previous owner of my 08 E92 M3. I want to get a full exhaust. I first thought it best to get the Akrapovic x-pipe mid pipe but it only comes with 100 cell cats and removes the primary cats. Being in CA that is asking for trouble. IND recommended the Challenge Street X-Pipe since it keeps the primary cat and thus would not fail obdII testing. Since CA might lose the visual inspection in 2014 that would be a big deal.

So, do any of you know what it will sound like if I get the Challenge Street X-Pipe and couple it to the Akrapovic Slip On exhaust?

For intake mod I was thinking about the Dinan intake or the MS intake. Excluding appearance... is one better than the other?

I am also contemplating upgrading the pulley... probably the one by ESS. Is it worth the cost and effort?

Lastly, do you guys think the ESS tune for the Akrapovic Evolution exhaust with the cold start mod would sound good/better than no flash? I hate the cold start drone I have with the Akrapovic Slip On.

Challenge street will not pass visual in CA, as the secondary cats are removed in this setup. FYI: Power is robbed by the primary cats, which are very restrictive. Unfortunately, there is not an aftermarket X-pipe on the market that is CARB approved. The stock X-pipe will need to be reinstalled if you expect to pass emissions testing.

Afterwards: since you already have an Akrapovic, why not mate it with an Akrapovic X-Pipe or if cost is prohibitive: Challenge Sport?

The Macht Schnell S2 intake is a good choice, and also offers an underdrive pulley to match. While the cars do very well in stock form in adjusting to mods, the ESS tune would simply be the icing on the cake afterwards for those more aggressive drivers.

Welcome to the forum, I understand the overwheling amount of info in here can be a bit intimidating at times. Feel free to contact me directly if you would like to discuss options.

Talk2meg00se · 09-19-2012, 12:17 AM

Hey man,

As you can see in the sig, I have a very similar set of mods, albeit I'm sticking with the slip-on.

Let me know if you have questions - never had the card dyno'ed, however. Will only have my subjective opinion to share - no empircal data, unfortunately.

jagman · 09-20-2012, 11:38 AM

Thank you for your comments. The more I think about it, it does seem best to get the Akra midpipe and keep the OEM mid pipe to swap and toggle flashes back to OEM before smogging... just as you suggested. That also looks pretty easy to do at home

. Adding the MS Intake kit and pulley will make for simple yet effective mods.

FogCityM3 · 09-20-2012, 02:35 PM

May want to consider the Dinan pulley. Has smaller diameter (more aggressive) vs competition (worth maybe a couple more hp)

09-18-2012, 12:38 AM	#1
jagman First Lieutenant 30 Rep 326 Posts Drives: 2008 Alpine White E92 M3 Join Date: Aug 2012 Location: Sacramento, CA iTrader: (1)	Mix/Match of Possible Mods It has been determined that I have the Akrapovic Slip On exhaust and the resonator was removed by the previous owner of my 08 E92 M3. I want to get a full exhaust. I first thought it best to get the Akrapovic x-pipe mid pipe but it only comes with 100 cell cats and removes the primary cats. Being in CA that is asking for trouble. IND recommended the Challenge Street X-Pipe since it keeps the primary cat and thus would not fail obdII testing. Since CA might lose the visual inspection in 2014 that would be a big deal. So, do any of you know what it will sound like if I get the Challenge Street X-Pipe and couple it to the Akrapovic Slip On exhaust? For intake mod I was thinking about the Dinan intake or the MS intake. Excluding appearance... is one better than the other? I am also contemplating upgrading the pulley... probably the one by ESS. Is it worth the cost and effort? Lastly, do you guys think the ESS tune for the Akrapovic Evolution exhaust with the cold start mod would sound good/better than no flash? I hate the cold start drone I have with the Akrapovic Slip On. __________________ 2008 AW E92 M3: Stage II and DCT tune by BPM Sport, convenience coding + coding for mDrive w/Euro MDM (no iDrive) & alarm retrofit by BPM Sport, Fox Red interior, ESS midpipe, Corsa slip on exhaust, carbon fiber M Performance spoiler, black grills, black OEM M3 ZCP 19" wheels, 15/12mm spacers and AW painted reflectors
	Appreciate 0 Tweet Quote

09-18-2012, 07:59 AM	#2
THE TECH BimmerPost Supporting Vendor 307 Rep 13,093 Posts Drives: BPMsport 2012 E92 M3 Join Date: Jun 2011 Location: Kansas iTrader: (45) Garage List 2013 Nissan GTR [0.00] 2019 Sierra Denali ... [0.00] 1999 Nissan Silvia [0.00] 1999 Nissan Skyline ... [0.00] 1998 Toyota Supra [0.00]	All of your questions aside from the subjectiveness of the sound of the exhaust can be found with a search of the forum.
	Appreciate 0 Quote

09-18-2012, 11:02 PM	#3
jagman First Lieutenant 30 Rep 326 Posts Drives: 2008 Alpine White E92 M3 Join Date: Aug 2012 Location: Sacramento, CA iTrader: (1)	I spent about 6 hours searching m3post as well as Google and so far I only see one person with the Akrapovic Slip On and the Challenge Street X-Pipe. I asked him about it but have yet to receive a reply. I also figured the ESS tune for the Akrapovic Evolution exhaust might not sound as good with the Akrapovic Slip On/ Challenge Street X-Pipe combo since it wasn't designed specifically for the mixed combo. I was hoping for a comment from someone who has heard both. That's nowhere on the web. I'll keep searching for the rest. __________________ 2008 AW E92 M3: Stage II and DCT tune by BPM Sport, convenience coding + coding for mDrive w/Euro MDM (no iDrive) & alarm retrofit by BPM Sport, Fox Red interior, ESS midpipe, Corsa slip on exhaust, carbon fiber M Performance spoiler, black grills, black OEM M3 ZCP 19" wheels, 15/12mm spacers and AW painted reflectors
	Appreciate 0 Quote

09-19-2012, 12:17 AM	#5
Talk2meg00se Captain 103 Rep 660 Posts Drives: 2013 E92 M3 Join Date: Aug 2010 Location: Los Angeles iTrader: (0)	Hey man, As you can see in the sig, I have a very similar set of mods, albeit I'm sticking with the slip-on. Let me know if you have questions - never had the card dyno'ed, however. Will only have my subjective opinion to share - no empircal data, unfortunately. __________________ TiAg \| ZCP \| DCT \| Euro MDM \| aFe filter \| MS Pulley \| Akra Slip-on \| MS Spacers \| 255/275 M4S \| H8 180s
	Appreciate 0 Quote

09-20-2012, 11:38 AM	#6
jagman First Lieutenant 30 Rep 326 Posts Drives: 2008 Alpine White E92 M3 Join Date: Aug 2012 Location: Sacramento, CA iTrader: (1)	Thank you for your comments. The more I think about it, it does seem best to get the Akra midpipe and keep the OEM mid pipe to swap and toggle flashes back to OEM before smogging... just as you suggested. That also looks pretty easy to do at home . Adding the MS Intake kit and pulley will make for simple yet effective mods. __________________ 2008 AW E92 M3: Stage II and DCT tune by BPM Sport, convenience coding + coding for mDrive w/Euro MDM (no iDrive) & alarm retrofit by BPM Sport, Fox Red interior, ESS midpipe, Corsa slip on exhaust, carbon fiber M Performance spoiler, black grills, black OEM M3 ZCP 19" wheels, 15/12mm spacers and AW painted reflectors
	Appreciate 0 Quote

09-20-2012, 02:35 PM	#7
FogCityM3 Colonel 499 Rep 2,400 Posts Drives: M3 (E90) & Porsche GT3 RS Join Date: Feb 2012 Location: San Francisco iTrader: (0)	May want to consider the Dinan pulley. Has smaller diameter (more aggressive) vs competition (worth maybe a couple more hp)
	Appreciate 0 Quote