2007 X-Pipe loss of high end power possibility

savannahz · 02-12-2017, 09:01 AM

I have a 2007, which has a resonator, and I'm thinking of putting in an x-pipe. Currently, I'm running catless dp's and the rest of the exhaust is stock. I plan on performing the PE mod in the future, but wanted to do everything in stages to see how it sounds individually.

Everything I've read and heard online points to this being a good way to go - both sound and performance wise. I called a very reputable exhaust shop, which a lot of guys on this forum have used, and he recommended not doing the x-pipe as he's had a lot of customers come back complaining of top end power loss.

I'm also running stage 2+ MHD with all other supporting mods.

Thanks!

ian3924 · 02-12-2017, 11:45 AM

I cut out my resonated xpipe a couple of months back and they welded two straightish pipes in it's place to the stock mufflers, didnt notice any power loss just a much meaner sound. Running MHD stg1 with catless dp and intakes

Antetokounmpo · 02-12-2017, 12:07 PM

lol

ian3924 · 02-12-2017, 12:45 PM

Quote:

Originally Posted by Harambe

lol

Wow great input, I cant believe you took the time to make such an informative and well thought out addition to this thread

Gohan335i7 · 02-12-2017, 01:24 PM

Get a performance exhaust if budget allows(you already have Downpipes) , it sounds a lot better than the xpipe/PE mod, plus it will save you a big hassle and time... IMHO

whyzee125 · 02-13-2017, 03:48 PM

Lol no you won't lose any top end power. Pretty surprising a reputable shop would tell you this. If you want more assurance, remember that the coupes come this way as does the BMW Performance Exhaust for the sedan. I also have an X pipe on my sedan and it makes zero difference in power.

Antetokounmpo · 02-14-2017, 08:24 AM

Quote:

Originally Posted by Harambe

lol

Sounds exactly like the type of shop that immediately trys to sway you towards Cherry Bomb glasspacks and a pair of Warlock mufflers instead.

Antetokounmpo · 02-16-2017, 09:07 AM

Quote:

Originally Posted by ian3924

Wow great input, I cant believe you took the time to make such an informative and well thought out addition to this thread

I was laughing so hard at the thread that's all I could type

cochran · 02-16-2017, 02:52 PM

I have an x-pipe in my e90 welded in place of resonator and no "top-end" power loss. sound is pretty cool

YoungBlood · 02-20-2017, 01:03 PM

Haha yeah if anything I had a very slight gain cuz I ditched the terrible smushed stock exhaust tubing right by the resonator. I have a 2.5 magnaflow x and the pe mod with kittyless dp's and it sounds great. Very mild drone, like enough hat I can't hear it unless I'm next to a wall, and 90% as loud as muffler deletes

csu87 · 02-20-2017, 06:02 PM

removing restriction isnt going to hurt you at all. now if you were going to just remove the exhaust all together, then you could see some loss

02-12-2017, 09:01 AM	#1
savannahz Private 22 Rep 78 Posts Drives: 2016 M4 Vert Join Date: Feb 2015 Location: Georgia iTrader: (0)	2007 X-Pipe loss of high end power possibility I have a 2007, which has a resonator, and I'm thinking of putting in an x-pipe. Currently, I'm running catless dp's and the rest of the exhaust is stock. I plan on performing the PE mod in the future, but wanted to do everything in stages to see how it sounds individually. Everything I've read and heard online points to this being a good way to go - both sound and performance wise. I called a very reputable exhaust shop, which a lot of guys on this forum have used, and he recommended not doing the x-pipe as he's had a lot of customers come back complaining of top end power loss. I'm also running stage 2+ MHD with all other supporting mods. Thanks!
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02-12-2017, 11:45 AM	#2
ian3924 Second Lieutenant 185 Rep 202 Posts Drives: 2010 E90 335i 6MT Join Date: Aug 2014 Location: NY iTrader: (0)	I cut out my resonated xpipe a couple of months back and they welded two straightish pipes in it's place to the stock mufflers, didnt notice any power loss just a much meaner sound. Running MHD stg1 with catless dp and intakes Last edited by ian3924; 02-12-2017 at 11:55 AM..
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02-12-2017, 12:07 PM	#3
Antetokounmpo Brigadier General 1552 Rep 3,475 Posts Drives: E90 6MT FBO; '18 F150 Platinum Join Date: Jul 2013 Location: WI iTrader: (3) Garage List 2018 Ford F-150 Pla ... [0.00] 2008 BMW 335xi [0.00]	lol __________________ 2008 335xi 6MT \| VRSF Catless DP \| VRSF 7" FMIC \| VRSF CP \| TIAL BOV \| DCI \| MHD 2+ BC Racing BR \| Stoptech 600 \| Firehawk Indy 500 255 Square \| Atric Altimax 225 Sq. 2018 F-150 Platinum 701A \| FX4 \| 3.5 EcoBeast
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02-12-2017, 01:24 PM	#5
Gohan335i7 Captain 312 Rep 766 Posts Drives: 335i Join Date: Nov 2015 Location: Florida iTrader: (0) Garage List 2010 335i [10.00]	Get a performance exhaust if budget allows(you already have Downpipes) , it sounds a lot better than the xpipe/PE mod, plus it will save you a big hassle and time... IMHO
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02-13-2017, 03:48 PM	#6
whyzee125 Brigadier General 1704 Rep 3,679 Posts Drives: Dinan stage 2 335i Join Date: Jul 2014 Location: Chattanooga Tn iTrader: (0)	Lol no you won't lose any top end power. Pretty surprising a reputable shop would tell you this. If you want more assurance, remember that the coupes come this way as does the BMW Performance Exhaust for the sedan. I also have an X pipe on my sedan and it makes zero difference in power.
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02-16-2017, 02:52 PM	#9
cochran Second Lieutenant 38 Rep 202 Posts Drives: 09 335i (E90) Join Date: Oct 2015 Location: So. Cal iTrader: (0)	I have an x-pipe in my e90 welded in place of resonator and no "top-end" power loss. sound is pretty cool __________________ 2009 E90 335i MHD Stage 2 \| BMW PE \| X-Pipe/Resonator Delete\| K&N Drop-In \|VRSF CP \| VRSF 7" FMIC \| VRSF DP's \| Apex Arc-8
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02-20-2017, 01:03 PM	#10
YoungBlood LongDongSilver 274 Rep 706 Posts Drives: e90 335i Join Date: Mar 2016 Location: Utah iTrader: (2)	Haha yeah if anything I had a very slight gain cuz I ditched the terrible smushed stock exhaust tubing right by the resonator. I have a 2.5 magnaflow x and the pe mod with kittyless dp's and it sounds great. Very mild drone, like enough hat I can't hear it unless I'm next to a wall, and 90% as loud as muffler deletes
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02-20-2017, 06:02 PM	#11
csu87 Banned 2134 Rep 3,553 Posts Drives: 09 335xi Join Date: Nov 2013 Location: Northern Colorado iTrader: (0)	removing restriction isnt going to hurt you at all. now if you were going to just remove the exhaust all together, then you could see some loss
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