E90 Resonator Delete / X-pipe install

jwebb335xi · 08-06-2015, 05:37 PM

I've got a 2008 335XI sedan with CP-E down-pipes. I plan to keep my secondary cats, but I am thinking about (1) removing the resonator and replacing it with an X-Pipe, (2) adding a moderately aggressive axel back (dinan, Remus, corsa), or (3) going to full secondary cat-back exhaust.

Can anyone comment on any of the three above?? I'm particularly interested in keeping all cats, but adding an "aggressive" NO Drone system...

Thanks!!

jskin1510 · 08-08-2015, 09:04 AM

I'm interested in this as well. More so the x pipe. I'd like a little more of an aggressive tone, but cost for exhaust (with little to no performance gains) just doesn't seem worth it to me. I'm going to stay tuned to this though to see what everyone else thinks.

winn3r · 08-08-2015, 09:59 AM

Cut out the secondary cat have pipes welded there and remove resonator with x pipe. Get corsa axle back exhaust.

Secret_Squirrel · 08-08-2015, 11:30 AM

I swapped my resenator for a xpipe and it made a big difference in my xi. I say go for the x pipe at least.

adidoman · 08-08-2015, 11:32 AM

I'm interested in this as well. I don't want anything really to drone and I'm curious how eliminating the resonator with an xpipe would be. I would like to keep my secondary cats because I need those to pass emissions in my state where they have sniff test.

adidoman · 08-08-2015, 11:33 AM

Quote:

Originally Posted by Secret_Squirrel

I swapped my resenator for a xpipe and it made a big difference in my xi. I say go for the x pipe at least.

Do you have a video of it?

Secret_Squirrel · 08-08-2015, 02:57 PM

[u2b][/u2b]

This is with downpipes. I got rid of the downpipes but it still sound great with just the xpipe. You wont regret it.

Ill make a video of just the x pipe .

jwebb335xi · 08-08-2015, 09:06 PM

Quote:

Originally Posted by Secret_Squirrel

I swapped my resenator for a xpipe and it made a big difference in my xi. I say go for the x pipe at least.

Do you recall which X pipe you used?

almcbs · 08-09-2015, 11:03 AM

Quote:

Originally Posted by jwebb335xi

Do you recall which X pipe you used?

Believe he used the ebay one if im not mistaken.

jwebb335xi · 08-09-2015, 12:09 PM

Quote:

Originally Posted by Secret_Squirrel

[u2b][/u2b]

This is with downpipes. I got rid of the downpipes but it still sound great with just the xpipe. You wont regret it.

Ill make a video of just the x pipe .

Sounds pretty good!!

Secret_Squirrel · 08-09-2015, 03:33 PM

Yes it was just an eBay one. Nothing special.

ferocity02 · 08-10-2015, 03:09 PM

I also replaced the resonator with an x-pipe and the difference in sound was very small with the stock catback and stock DP's.

GOS7 · 08-11-2015, 04:03 PM

Anyone have link they can post up? When I search "335i x pipe" on ebay I get nothing but flex pipes and a full exhaust systems.

ferocity02 · 08-11-2015, 04:09 PM

Quote:

Originally Posted by Ghos7N54

Anyone have link they can post up? When I search "335i x pipe" on ebay I get nothing but flex pipes and a full exhaust systems.

Any 2.5" x-pipe will work, I used Magnaflow 10791. There is no bolt-in version, it's something you'll need an exhaust shop to install.

prelude2perfect · 08-11-2015, 06:49 PM

search "2.5 x pipe", don't put 335i in the search, it's not like they made an x pipe just for our cars lol

GOS7 · 08-11-2015, 07:00 PM

Lol, thanks guys!

Jaronbwall · 08-12-2015, 08:13 AM

That sounds good and not to loud. In video are you running stock mufflers?

SeanS54 · 08-12-2015, 05:57 PM

I left the 2nd cats on mine, removed the resonator and added an X-pipe, and did the exhaust PE mod.

Sounds a little louder than stock but absolutely no drone.

Secret_Squirrel · 08-12-2015, 08:38 PM

Quote:

Originally Posted by Jarronbwall

That sounds good and not to loud. In video are you running stock mufflers?

Yes stock mufflers.

Secret_Squirrel · 08-12-2015, 08:42 PM

Quote:

Originally Posted by SeanS54

I left the 2nd cats on mine, removed the resonator and added an X-pipe, and did the exhaust PE mod.

Sounds a little louder than stock but absolutely no drone.

Thats what im doing next. I have the mufflers done, tips are in, just need to install my new water pump and t stat and exhaust mod will be on next week.

jskin1510 · 08-12-2015, 09:57 PM

Quote:

Originally Posted by Secret_Squirrel

I swapped my resenator for a xpipe and it made a big difference in my xi. I say go for the x pipe at least.

Yea, That sounds good. IMO slightly louder than stock but still a deep tone, just a little more aggressive when under acceleration. I might have to go the same route.

Secret_Squirrel · 08-23-2015, 11:43 AM

[u2b][/u2b]

quick video with stock downpipes

08-06-2015, 05:37 PM	#1
jwebb335xi Major 197 Rep 1,070 Posts Drives: 2008 335 XI Join Date: Jun 2014 Location: Chicago Burbs iTrader: (0)	E90 Resonator Delete / X-pipe install I've got a 2008 335XI sedan with CP-E down-pipes. I plan to keep my secondary cats, but I am thinking about (1) removing the resonator and replacing it with an X-Pipe, (2) adding a moderately aggressive axel back (dinan, Remus, corsa), or (3) going to full secondary cat-back exhaust. Can anyone comment on any of the three above?? I'm particularly interested in keeping all cats, but adding an "aggressive" NO Drone system... Thanks!! __________________ JWebb335xi MHD / Wedge / 93 Octane/ xHP / FMIC / Inlets / Catted DPs / CP / DVs
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08-08-2015, 09:04 AM	#2
jskin1510 Second Lieutenant 28 Rep 265 Posts Drives: 08 BMW 335xi Join Date: Feb 2015 Location: Maryland iTrader: (2)	I'm interested in this as well. More so the x pipe. I'd like a little more of an aggressive tone, but cost for exhaust (with little to no performance gains) just doesn't seem worth it to me. I'm going to stay tuned to this though to see what everyone else thinks. __________________ 08 335xi- CP-E DCI's,VRSF 7" FMIC, UR Charge pipe w/ Tial Q BOV, JB4 G5, PE mod, 19" Sonic Tuning SC 7 wheels
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08-08-2015, 09:59 AM	#3
winn3r Private First Class 21 Rep 115 Posts Drives: 2020 X4MC Join Date: Apr 2013 Location: NYC iTrader: (0)	Cut out the secondary cat have pipes welded there and remove resonator with x pipe. Get corsa axle back exhaust.
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08-08-2015, 11:30 AM	#4
Secret_Squirrel Second Lieutenant 23 Rep 282 Posts Drives: Tiag 09 335xi Join Date: Apr 2012 Location: Chicago iTrader: (4)	I swapped my resenator for a xpipe and it made a big difference in my xi. I say go for the x pipe at least.
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08-08-2015, 11:32 AM	#5
adidoman First Lieutenant 56 Rep 369 Posts Drives: '10 335i xDrive Join Date: May 2014 Location: Denver, CO iTrader: (1)	I'm interested in this as well. I don't want anything really to drone and I'm curious how eliminating the resonator with an xpipe would be. I would like to keep my secondary cats because I need those to pass emissions in my state where they have sniff test.
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08-08-2015, 02:57 PM	#7
Secret_Squirrel Second Lieutenant 23 Rep 282 Posts Drives: Tiag 09 335xi Join Date: Apr 2012 Location: Chicago iTrader: (4)	[u2b][/u2b] This is with downpipes. I got rid of the downpipes but it still sound great with just the xpipe. You wont regret it. Ill make a video of just the x pipe .
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08-09-2015, 03:33 PM	#11
Secret_Squirrel Second Lieutenant 23 Rep 282 Posts Drives: Tiag 09 335xi Join Date: Apr 2012 Location: Chicago iTrader: (4)	Yes it was just an eBay one. Nothing special.
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08-10-2015, 03:09 PM	#12
ferocity02 Colonel 530 Rep 2,083 Posts Drives: 2013 135is Join Date: May 2014 Location: USA iTrader: (8)	I also replaced the resonator with an x-pipe and the difference in sound was very small with the stock catback and stock DP's. __________________ 2013 135is DCT Carbon Black Metallic
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08-11-2015, 04:03 PM	#13
GOS7 Enthusiast 67 Rep 236 Posts Drives: F82, E28 535is Join Date: Sep 2014 Location: TX iTrader: (0)	Anyone have link they can post up? When I search "335i x pipe" on ebay I get nothing but flex pipes and a full exhaust systems.
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08-11-2015, 06:49 PM	#15
prelude2perfect Captain 60 Rep 621 Posts Drives: 2013 M5 and 2015 535i Join Date: Apr 2010 Location: Savannah, GA iTrader: (8)	search "2.5 x pipe", don't put 335i in the search, it's not like they made an x pipe just for our cars lol
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08-11-2015, 07:00 PM	#16
GOS7 Enthusiast 67 Rep 236 Posts Drives: F82, E28 535is Join Date: Sep 2014 Location: TX iTrader: (0)	Lol, thanks guys!
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08-12-2015, 08:13 AM	#17
Jaronbwall Driving cars and riding bikes really fast 285 Rep 1,002 Posts Drives: 2009 335i Join Date: Sep 2014 Location: Indianapolis iTrader: (0)	That sounds good and not to loud. In video are you running stock mufflers? __________________ 335i, sport pkg, 3 pedals, Blacked out, LED markers, OZ Ultraleggera wheels, Firestone Indy 500s, x-pipe, vibrant 1792, PE mod MHD stage 2+, BMS DPs, ARM charge pipe, Tial BOV, ARM FMIC, dual cone, CSF radiator, M3 control arms, sways, HAWK pads. https://www.strava.com/athletes/8309149 Follow me on Strava
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08-12-2015, 05:57 PM	#18
SeanS54 Captain 168 Rep 842 Posts Drives: F82 M4 ZCP Join Date: Jan 2011 Location: Bay Area, CA iTrader: (20)	I left the 2nd cats on mine, removed the resonator and added an X-pipe, and did the exhaust PE mod. Sounds a little louder than stock but absolutely no drone. __________________ https://www.youtube.com/user/SeanS54/videos
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08-23-2015, 11:43 AM	#22
Secret_Squirrel Second Lieutenant 23 Rep 282 Posts Drives: Tiag 09 335xi Join Date: Apr 2012 Location: Chicago iTrader: (4)	[u2b][/u2b] quick video with stock downpipes
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