OEM x pipe/exhaust diameter| Tuning question

MCFilmWerks · 03-23-2016, 05:31 PM

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Hey guys, so I dropped off my car to get a custom x pipe made, from searching around online everything I found pointed to the exhaust being 2.5 inches in diameter. Some other threads said 2.5, the borla x pipe says 2.5, and i believe it was the active autowerke said 2.5.

Well the guy called me and said that the piping is 2.75, so now I have to wait until next week for it, but I just feel like the 2.5 inch would work.

So my question is, is the oem x pipe 2.5 or 2.75 inches?

___________________________________________

Separate of this, since I'm going catless, and also since I just put my wheels on so the speedo is reading wrong. Is there a handheld tuner or something along those lines that lets you change parameters and what not?

When I had my mustang I had a tuner and my dyno tunes were loaded on it, but I could also go in and change stuff like that on the actual tuner. I'm pretty new to the M's so I wasn't sure if there was something similar to this for m3's

Thanks in advance everyone!

bosspower · 03-24-2016, 01:39 AM

I did 2,25 from headers till muffler .
perfectly happy with power and sound .

Is enough i think if staying NA.

American Dave · 03-24-2016, 01:44 AM

My custom test pipes and x pipe are 2.5" running to my Borla exhaust. Unless you are going to SC the car then that size is what you want trust me.
http://m3world.com.au/product/stainl...no-resonators/

MCFilmWerks · 03-28-2016, 10:39 AM

yeah i neded up with the 2.5 and it sounds good, thank you guys!

03-23-2016, 05:31 PM	#1
MCFilmWerks Private First Class 21 Rep 112 Posts Drives: IB E92 M3 Join Date: Oct 2015 Location: New Jersey iTrader: (0)	OEM x pipe/exhaust diameter\| Tuning question Featured on BIMMERPOST.com Hey guys, so I dropped off my car to get a custom x pipe made, from searching around online everything I found pointed to the exhaust being 2.5 inches in diameter. Some other threads said 2.5, the borla x pipe says 2.5, and i believe it was the active autowerke said 2.5. Well the guy called me and said that the piping is 2.75, so now I have to wait until next week for it, but I just feel like the 2.5 inch would work. So my question is, is the oem x pipe 2.5 or 2.75 inches? ___________________________________________ Separate of this, since I'm going catless, and also since I just put my wheels on so the speedo is reading wrong. Is there a handheld tuner or something along those lines that lets you change parameters and what not? When I had my mustang I had a tuner and my dyno tunes were loaded on it, but I could also go in and change stuff like that on the actual tuner. I'm pretty new to the M's so I wasn't sure if there was something similar to this for m3's Thanks in advance everyone! Last edited by MCFilmWerks; 03-24-2016 at 06:02 AM..
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03-24-2016, 01:39 AM	#2
bosspower Private 7 Rep 52 Posts Drives: E93 M3 Join Date: Oct 2015 Location: Poland iTrader: (0)	I did 2,25 from headers till muffler . perfectly happy with power and sound . Is enough i think if staying NA.
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03-24-2016, 01:44 AM	#3
American Dave Captain 118 Rep 621 Posts Drives: 2008 Jerez Black E92 M3 Join Date: Oct 2014 Location: Perth Western Australia iTrader: (0) Garage List 2008 BMW M3 E92 [0.00]	My custom test pipes and x pipe are 2.5" running to my Borla exhaust. Unless you are going to SC the car then that size is what you want trust me. http://m3world.com.au/product/stainl...no-resonators/ __________________ Jerez Black 2008 6MT with Borla Atak Exhaust/ M3 World X Pipe and Test Pipes/ aFe Pro Stage 2 Intake / 19" Advan DZ-DF Forged Wheels wrapped in ContiSport Contact 5P 245/35/19 Fronts & 285/30/19 Rears/ KW Var 3 Coilovers / BPM Sports Stage 2 Tuned/ VAC Rod Bearing Replacement / Throttle Body Actuator Gear Set Last edited by American Dave; 03-24-2016 at 01:52 AM..
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03-28-2016, 10:39 AM	#4
MCFilmWerks Private First Class 21 Rep 112 Posts Drives: IB E92 M3 Join Date: Oct 2015 Location: New Jersey iTrader: (0)	yeah i neded up with the 2.5 and it sounds good, thank you guys!
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