UR Downpipe Update after 2k Miles

Mr. 5 · 10-14-2007, 07:19 PM

I drive quite a bit since I work so far from home, and I also take my car to the strip every once and a while. In other words, I do a bunch of different driving and the UR downpipes have been absolutely perfect.

I've heard the worry that the welds are going to break, so I'm just updating you guys that everything is working as good as when I initially installed them.

I put my car on ramps today so I could put on some exhaust wrap around my X pipe and the high flow cats. I've been told that the "raspiness" or metallic sound could be vibrations coming from the actual X pipe and the cats and if I put some wrapping around it, then it would mufflle the actual unit making the sound go through the piping and mufflers. I figured that it couldn't hurt so I did it--and WOW!

Not only did I change the sound but I have now decreased the heat in my engine bay. Now, of course the sound didn't change dramaticaly like I threw an a set of resonators but the sound is just smoother now.

Here's some pics that I took when I was under there.

Sniz · 10-14-2007, 07:21 PM

Thanks! So the wrapping was put on the cats it looks like? Maybe I need to reread your post

Mr. 5 · 10-14-2007, 07:26 PM

Quote:

Originally Posted by Sniz

Thanks! So the wrapping was put on the cats it looks like? Maybe I need to reread your post

Yep. One thing I noticed in the past was that when I first started the car, I use to hear a tinny vibration in the exhaust. It sounded like it was coming from the front. Well, it was obviously coming from the metal cats.
Now, I haven't heard it yet.

We'll see how it goes in the future because I just put the wrap on today, but when I went for a drive it was awesome!

e90AW335i · 10-14-2007, 07:36 PM

Good info as usual Mr. 5......

Mr. 5 · 10-14-2007, 09:07 PM

Quote:

Originally Posted by kyleh4852

Good info as usual Mr. 5......

Thanks man! Just trying to post my experiences.

E90ice · 10-14-2007, 10:04 PM

I don't remember....did you get any dynos?

How is the power?

What about lag? Is it better with DPs?

ADHD · 10-14-2007, 10:07 PM

Very nice DETAILED pictures and Informative response....
That looks like some kind of fiberglass/asbestos wrap???
Either way Im guessing its working but will it burn??

sambonator · 10-14-2007, 10:13 PM

Did the catted UR downpipes give you a noticeable bump in power? Sorry if this had already been asked...

Walked U · 10-14-2007, 11:39 PM

Awesome Craig.

Thermal warp actually works pretty good also.

ironic · 10-14-2007, 11:53 PM

nice

Mr. 5 · 10-15-2007, 11:03 AM

Quote:

Originally Posted by ADHD

Very nice DETAILED pictures and Informative response....
That looks like some kind of fiberglass/asbestos wrap???
Either way Im guessing its working but will it burn??

It's high temp fiberglass/composite to withstand temps to 2000 degrees F.

1clean335i · 10-15-2007, 12:11 PM

thanks for the update... is the rest of your exhaust system stock?

Mr. 5 · 10-15-2007, 12:41 PM

Quote:

Originally Posted by 1clean335i

thanks for the update... is the rest of your exhaust system stock?

No, I have the secondary cat delete, magnaflow X pipe instead of resonator, and magnaflow rear mufflers.
Here:
http://www.e90post.com/forums/showpo...78&postcount=1

max boost · 10-15-2007, 12:44 PM

exhaust wrap definately works well for heat retention, dampens the sound well too. i have since removed the wrap as it deterates rapidly and also can act as a wick if oil was to get on it. the headers are now swainteched.
your DP wont get as hot as my headers so i really wouldnt wary about deteration.

max boost · 10-15-2007, 12:48 PM

Quote:

Originally Posted by Mr. 5

No, I have the secondary cat delete, magnaflow X pipe instead of resonator, and magnaflow rear mufflers.
Here:
http://www.e90post.com/forums/showpo...78&postcount=1

love your set up....i too just used magnaflows ....for my c5. they are a great muffler at a great price! see my e cut outs?
335 is next

OC Guy · 10-15-2007, 12:51 PM

Good stuff. The heating wraps are fine, they are designed for this type of stuff, there should be no worries. Thanks for the info Mr.5..

Mr. 5 · 10-15-2007, 12:54 PM

Quote:

Originally Posted by max boost

love your set up....i too just used magnaflows too....for my c5. they are a great muffler at a great price! see my e cut outs?
335 is next

Awesome man! The cutouts should be super loud!!

Explain a little more about the oil though. Should I overload on the silicone spray?

max boost · 10-15-2007, 01:03 PM

Quote:

Originally Posted by Mr. 5

Awesome man! The cutouts should be super loud!!

Explain a little more about the oil though. Should I overload on the silicone spray?

well... if i had an oil leak and it was to get on the wrap it "could" cause a fire.

actually no....turbos keep it quiet...here ya go...

http://www.cf-performance.com/nick/c5exhaust.wmv

jthurs · 10-15-2007, 01:09 PM

Nice set up. What kind of wrap is that? And where on your x-pipe did you put it? Do you have photos?

Mr. 5 · 10-15-2007, 01:22 PM

Quote:

Originally Posted by max boost

well... if i had an oil leak and it was to get on the wrap it "could" cause a fire.

actually no....turbos keep it quiet...here ya go...

http://www.cf-performance.com/nick/c5exhaust.wmv

I know that turbos muffle the sound, but I've heard of some wicked sound clips with mufflers. I could only imagine the sound with cut outs.

Mr. 5 · 10-15-2007, 01:23 PM

Quote:

Originally Posted by jthurs

Nice set up. What kind of wrap is that? And where on your x-pipe did you put it? Do you have photos?

Sorry, but no photos of the X pipe wrapped.
I used DEI exhaust wrap.

Garrett · 10-15-2007, 05:35 PM

Quote:

Originally Posted by max boost

exhaust wrap definately works well for heat retention, dampens the sound well too. i have since removed the wrap as it deterates rapidly and also can act as a wick if oil was to get on it. the headers are now swainteched.
your DP wont get as hot as my headers so i really wouldnt wary about deteration.

Swainteched..?

No google matches, is that spelled right. I also typed in exhaust wrap..

10-14-2007, 07:19 PM	#1
Mr. 5 Modder Raider 753 Rep 8,633 Posts Drives: M3 Join Date: Apr 2007 Location: Surf City, HB iTrader: (31) Garage List 2007 e90 335i [8.00]	UR Downpipe Update after 2k Miles I drive quite a bit since I work so far from home, and I also take my car to the strip every once and a while. In other words, I do a bunch of different driving and the UR downpipes have been absolutely perfect. I've heard the worry that the welds are going to break, so I'm just updating you guys that everything is working as good as when I initially installed them. I put my car on ramps today so I could put on some exhaust wrap around my X pipe and the high flow cats. I've been told that the "raspiness" or metallic sound could be vibrations coming from the actual X pipe and the cats and if I put some wrapping around it, then it would mufflle the actual unit making the sound go through the piping and mufflers. I figured that it couldn't hurt so I did it--and WOW! Not only did I change the sound but I have now decreased the heat in my engine bay. Now, of course the sound didn't change dramaticaly like I threw an a set of resonators but the sound is just smoother now. Here's some pics that I took when I was under there. Attached Images __________________ e36 M3 Coupe, e36 325i Sedan e90 335i--SOLD Best 60-130-------------9.15 Seconds------------------WWW.MR5RACING.COM
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10-14-2007, 07:21 PM	#2
Sniz Lieutenant General 656 Rep 10,587 Posts Drives: e92 335 - gone // e36 M3 turbo Join Date: Mar 2007 Location: Ellicott City, MD iTrader: (1)	Thanks! So the wrapping was put on the cats it looks like? Maybe I need to reread your post __________________
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10-14-2007, 07:36 PM	#4
e90AW335i Major General 137 Rep 6,608 Posts Drives: e90 335i Join Date: Sep 2007 Location: ...... iTrader: (4)	Good info as usual Mr. 5......
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10-14-2007, 10:04 PM	#6
E90ice Banned 205 Rep 2,002 Posts Drives: 2008 335xi Coupe Join Date: May 2006 Location: WA iTrader: (0)	I don't remember....did you get any dynos? How is the power? What about lag? Is it better with DPs? __________________
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10-14-2007, 10:07 PM	#7
ADHD Brigadier General 196 Rep 4,095 Posts Drives: F30 328i Join Date: Apr 2006 Location: Magic Mountain iTrader: (38) Garage List 21 M540i [0.00] 07 e90 335 [0.00]	Very nice DETAILED pictures and Informative response.... That looks like some kind of fiberglass/asbestos wrap??? Either way Im guessing its working but will it burn?? __________________
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10-14-2007, 10:13 PM	#8
sambonator Samtaro! 124 Rep 2,601 Posts Drives: 2014 F32 N55 Alpinweiß Join Date: May 2007 Location: Newport Beach, CA, USA iTrader: (7)	Did the catted UR downpipes give you a noticeable bump in power? Sorry if this had already been asked... __________________ Last edited by sambonator; 10-14-2007 at 10:13 PM.. Reason: typo
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10-14-2007, 11:39 PM	#9
Walked U Brigadier General 179 Rep 3,125 Posts Drives: Too many to list Join Date: Nov 2006 Location: USA iTrader: (5)	Awesome Craig. Thermal warp actually works pretty good also. __________________ Previous - E90 335i, E82 135i, E89 Z4 3.5SI, Range Rover S/C, Ultra White RCF, Maserati Granturismo Current Lexus: SMG LC500 performance package Porsche:1973 911E Ferrari 575 SA, 458 Italia
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10-14-2007, 11:53 PM	#10
ironic Major General 254 Rep 8,338 Posts Drives: Jet Black 335i Join Date: Dec 2006 Location: San Francisco, Ca iTrader: (22)	nice __________________ Widebody 335i Project Car BUILD \| PHOTOSHOOT
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10-15-2007, 12:11 PM	#12
1clean335i Perf BMW mag issue 147, 159 414 Rep 6,803 Posts Drives: Project Estoril Join Date: Feb 2007 Location: Miami, FL iTrader: (31) Garage List 2013 335i M-sport [0.00] 2011 X5 xdrive35i M ... [0.00] 2009 335i M-sport [0.00] 07' 335i Sedan [0.00]	thanks for the update... is the rest of your exhaust system stock? __________________ '13 Estoril Blue 335i M-sport *Don't PM me!* Message me here- http://www.facebook.com/ProjectEstoril
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10-15-2007, 12:44 PM	#14
max boost Lieutenant 40 Rep 408 Posts Drives: 07 335i Join Date: Nov 2006 Location: east side iTrader: (1)	exhaust wrap definately works well for heat retention, dampens the sound well too. i have since removed the wrap as it deterates rapidly and also can act as a wick if oil was to get on it. the headers are now swainteched. your DP wont get as hot as my headers so i really wouldnt wary about deteration.
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10-15-2007, 12:51 PM	#16
OC Guy General 539 Rep 18,123 Posts Drives: AW 335D E90 Join Date: Oct 2006 Location: Irvine/Aliso Viejo, CA iTrader: (9) Garage List 2007 335i [0.00]	Good stuff. The heating wraps are fine, they are designed for this type of stuff, there should be no worries. Thanks for the info Mr.5.. __________________ Current: 2010 Alpine White 335D LCI l 19" BBS LMs l KW V2 Coilovers l BMW Performance Grilles l MSport Front/Rear l Karbonwerke Trunk l F1 Pinnacle Tint 35% Former: E92 Space Grey 335i Latest pics
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10-15-2007, 01:09 PM	#19
jthurs Private First Class 23 Rep 143 Posts Drives: 335i Coupe, Black w/ Coral Red Join Date: Nov 2006 Location: Los Angeles iTrader: (1)	Nice set up. What kind of wrap is that? And where on your x-pipe did you put it? Do you have photos?
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