E90Post
 


TNT Racewerks
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Who has a welded aftermarket exhaust?



Reply
 
Thread Tools Search this Thread
      07-21-2008, 11:09 PM   #1
luca335i
Major
luca335i's Avatar
62
Rep
1,193
Posts

Drives: 335I Sedan
Join Date: Jan 2008
Location: Unknown

iTrader: (3)

Who has a welded aftermarket exhaust?

Jus askin if anyone welded their aftermarket exhaust instead of using shitty slip joints. I may wanna do this but Im afraid to screw up my 1700 dollar exhaust.
Appreciate 0
      07-21-2008, 11:10 PM   #2
O-cha
Brigadier General
O-cha's Avatar
232
Rep
4,726
Posts

Drives: Mcoupe
Join Date: Oct 2007
Location: In front of you

iTrader: (2)

Slip joints are what make the exhaust fit, you weld your exhaust and you're NEVER going to get it lined up.
__________________
Appreciate 0
      07-21-2008, 11:17 PM   #3
AJerman
Major
AJerman's Avatar
United_States
32
Rep
1,381
Posts

Drives: '08 335i
Join Date: Mar 2008
Location: Wake Forest, NC

iTrader: (0)

Quote:
Originally Posted by O-cha View Post
Slip joints are what make the exhaust fit, you weld your exhaust and you're NEVER going to get it lined up.
That's one of the silliest things I've ever read on here.

Just take it to someone who knows how to weld exhaust and nothing will be screwed up. Slip joints just make installation and removal easy. If you are doing it yourself, just use the slip joints, then after 1000 miles or so look underneath again. If there are no leaks, then don't worry about it. If it looks like you have problems with leaks, get someone to weld it.

Typically with slip joints I see slight leaking, but usually not enough to be worried about. It's really just up to you.
__________________
2008 BMW 335i: Jet Black, Jade Gray, Gray Poplar, 6MT - Stock... for now.
Appreciate 0
      07-21-2008, 11:20 PM   #4
Fraggy
Brigadier General
Fraggy's Avatar
United_States
198
Rep
3,469
Posts

Drives: 2016 M3
Join Date: Jun 2005
Location: San Diego

iTrader: (11)

None of my exhausts sealed without welding.
__________________
2016 Alpine White M3 (gone)
2019 Alfa Romeo Guilia (Totaled)
2020 Car-less 😁 (no more)
2020 M340
Appreciate 0
      07-21-2008, 11:23 PM   #5
luca335i
Major
luca335i's Avatar
62
Rep
1,193
Posts

Drives: 335I Sedan
Join Date: Jan 2008
Location: Unknown

iTrader: (3)

Quote:
Originally Posted by Fraggy View Post
None of my exhausts sealed without welding.
+ 1
Appreciate 0
      07-21-2008, 11:24 PM   #6
luca335i
Major
luca335i's Avatar
62
Rep
1,193
Posts

Drives: 335I Sedan
Join Date: Jan 2008
Location: Unknown

iTrader: (3)

Quote:
Originally Posted by O-cha View Post
Slip joints are what make the exhaust fit, you weld your exhaust and you're NEVER going to get it lined up.
Then how do they make custom exhausts then.
Appreciate 0
      07-21-2008, 11:27 PM   #7
wj4
Major General
United_States
358
Rep
7,719
Posts

Drives: E90 manual 335i
Join Date: Nov 2006
Location: Burbank, CA

iTrader: (8)

Pretty normal to get an OEM muffler cut and have an aftermarket one welded onto the pipe. This action probably accounts for more than 50% of the stuff done at muffler shops.
Appreciate 0
      07-21-2008, 11:30 PM   #8
luca335i
Major
luca335i's Avatar
62
Rep
1,193
Posts

Drives: 335I Sedan
Join Date: Jan 2008
Location: Unknown

iTrader: (3)

Quote:
Originally Posted by wj4 View Post
Pretty normal to get an OEM muffler cut and have an aftermarket one welded onto the pipe. This action probably accounts for more than 50% of the stuff done at muffler shops.

I have an aftermarket catback and wanna get it welded instead of using the slip joints.
Appreciate 0
      07-21-2008, 11:37 PM   #9
AJerman
Major
AJerman's Avatar
United_States
32
Rep
1,381
Posts

Drives: '08 335i
Join Date: Mar 2008
Location: Wake Forest, NC

iTrader: (0)

Quote:
Originally Posted by luca335i View Post
I have an aftermarket catback and wanna get it welded instead of using the slip joints.
Well, what they will do is put it together with the slip joints, then just weld around them. It's a piece of cake to do, and will seal VERY well and be VERY strong. That's far superior than either two pipes butted up and welded, or just a plain slip joint.
__________________
2008 BMW 335i: Jet Black, Jade Gray, Gray Poplar, 6MT - Stock... for now.
Appreciate 0
      07-21-2008, 11:40 PM   #10
luca335i
Major
luca335i's Avatar
62
Rep
1,193
Posts

Drives: 335I Sedan
Join Date: Jan 2008
Location: Unknown

iTrader: (3)

The guy at the exhaust shop says he can do it for sure. He will have to take the exhaust off to weld it all the way around though. He said three hours.
Appreciate 0
      07-21-2008, 11:51 PM   #11
O-cha
Brigadier General
O-cha's Avatar
232
Rep
4,726
Posts

Drives: Mcoupe
Join Date: Oct 2007
Location: In front of you

iTrader: (2)

Quote:
Originally Posted by AJerman View Post
That's one of the silliest things I've ever read on here.
Really? I wish you luck getting an aftermarket exhaust to fit after welding it. Actually thats a lie, I hope you fail miserably just to prove my point. Most barely fit properly with the slip joints.

Quote:
Originally Posted by luca335i View Post
Then how do they make custom exhausts then.
You said it, custom exhausts, that's how. Not difficult when your sitting there fitting it on your car then welding it.
__________________
Appreciate 0
      07-21-2008, 11:55 PM   #12
luca335i
Major
luca335i's Avatar
62
Rep
1,193
Posts

Drives: 335I Sedan
Join Date: Jan 2008
Location: Unknown

iTrader: (3)

Well I think hes gonna buy me a new exhaust if he fucks it up. (guy at muffler shop).
Appreciate 0
      07-22-2008, 12:08 AM   #13
AJerman
Major
AJerman's Avatar
United_States
32
Rep
1,381
Posts

Drives: '08 335i
Join Date: Mar 2008
Location: Wake Forest, NC

iTrader: (0)

Quote:
Originally Posted by O-cha View Post
Really? I wish you luck getting an aftermarket exhaust to fit after welding it. Actually thats a lie, I hope you fail miserably just to prove my point. Most barely fit properly with the slip joints.
No need to wish me luck. I've done it many times in the past, as have many, many, MANY other people, for years and years.

If whoever you use to install your exhaust can't lay a bead around a slip joint, then you might want to look for someone who actually knows how to weld.
__________________
2008 BMW 335i: Jet Black, Jade Gray, Gray Poplar, 6MT - Stock... for now.
Appreciate 0
      07-22-2008, 12:24 AM   #14
Mr. 5
Modder Raider
Mr. 5's Avatar
Scotland
802
Rep
8,633
Posts

Drives: M3
Join Date: Apr 2007
Location: Surf City, HB

iTrader: (31)

Garage List
2007 e90 335i  [8.00]
I have had all of my fittings welded, but I prefer the flanged joints for ease of installation.
Flanged is the way to go!

I believe that AE is the only aftermarket comapny to have all sections of their DP back exhaust flanged. Props to them!
__________________
e36 M3 Coupe, e36 325i Sedan
e90 335i--SOLD

Best 60-130-------------9.15 Seconds------------------WWW.MR5RACING.COM
Appreciate 0
      07-22-2008, 12:29 AM   #15
luca335i
Major
luca335i's Avatar
62
Rep
1,193
Posts

Drives: 335I Sedan
Join Date: Jan 2008
Location: Unknown

iTrader: (3)

Quote:
Originally Posted by Mr. 5 View Post
I have had all of my fittings welded, but I prefer the flanged joints for ease of installation.
Flanged is the way to go!

I believe that AE is the only aftermarket comapny to have all sections of their DP back exhaust flanged. Props to them!
What exhaust do you have MR.5?
Appreciate 0
      07-22-2008, 12:31 AM   #16
O-cha
Brigadier General
O-cha's Avatar
232
Rep
4,726
Posts

Drives: Mcoupe
Join Date: Oct 2007
Location: In front of you

iTrader: (2)

Quote:
Originally Posted by AJerman View Post
If whoever you use to install your exhaust can't lay a bead around a slip joint, then you might want to look for someone who actually knows how to weld.
Sorry, misunderstanding, your definition of welding an exhaust is clearly different then mine. Go ahead and weld the slips together all ya want.
__________________
Appreciate 0
      07-22-2008, 12:35 AM   #17
luca335i
Major
luca335i's Avatar
62
Rep
1,193
Posts

Drives: 335I Sedan
Join Date: Jan 2008
Location: Unknown

iTrader: (3)

Quote:
Originally Posted by O-cha View Post
Sorry, misunderstanding, your definition of welding an exhaust is clearly different then mine. Go ahead and weld the slips together all ya want.


What did you mean the O-cha? Any advice woould be greatly appreciated. My idea is to ditch the slip joints and weld it instead. I already cut the stock exhaust already. I dont see how that would be a problem unless the guys who are doin it are a bunch of tards. They seem pretty confident in doin it. They say its a 2.5 to 3 hour job though.
Appreciate 0
      07-22-2008, 12:42 AM   #18
O-cha
Brigadier General
O-cha's Avatar
232
Rep
4,726
Posts

Drives: Mcoupe
Join Date: Oct 2007
Location: In front of you

iTrader: (2)

Quote:
Originally Posted by luca335i View Post
What did you mean the O-cha? Any advice woould be greatly appreciated. My idea is to ditch the slip joints and weld it instead.
Right, that's what I thought you meant, in which case revert back to my original comment, it's just not going to fit properly, the only reason aftermarket exhausts fit is from the flexibility of the clamps.


Anyone who has installed more than a few exhausts will tell you that. Some companies make exhausts that fit like OEM, unfortunately 90% do not.

You said your "muffler" guy will buy you a new exhaust? Then let him do it, but to get it to fit well hes going to have to do some fabrication guaranteed.
__________________
Appreciate 0
      07-22-2008, 01:06 AM   #19
AJerman
Major
AJerman's Avatar
United_States
32
Rep
1,381
Posts

Drives: '08 335i
Join Date: Mar 2008
Location: Wake Forest, NC

iTrader: (0)

Okay, I think I know what you're saying now. Yes, you obviously can't just toss the slips completely and butt up the pipes. If the pipes are even an inch shorter that would have been taken up in the slip joint (which they probably are), then butting up the pipes would lose that inch and you can have any problem from just your tips being too short, to the pipes not fitting around the suspension, etc.

However, my point remains, to the OP. Removing the slip joints completely is silly. That's like taking a kit and throwing away an important piece and trying to make it work without it. There's absolutely no reason why you shouldn't line it up with the slip joints, then weld the slip joints together with the rest of the pipe. Then you don't have to worry about getting clamps tight enough, and you have a strong and tight seal.

Otherwise, as O-Cha was saying (and I missed it, sorry), whoever is doing the job is probably going to have to cut another piece of pipe to fill up any gap.

+1 on a flanged setup though, Mr. 5. I installed a Mac midpipe and catback on my old Mustang and it was flanged all the way back, and I've seen no evidence of much leaking. It's a much better solution to a simple slip joint for bolt together.
__________________
2008 BMW 335i: Jet Black, Jade Gray, Gray Poplar, 6MT - Stock... for now.
Appreciate 0
      07-22-2008, 01:37 AM   #20
luca335i
Major
luca335i's Avatar
62
Rep
1,193
Posts

Drives: 335I Sedan
Join Date: Jan 2008
Location: Unknown

iTrader: (3)

Who knows. He wil probably do some fabrication to make it fit properly. But to lose the slip joints would look super clean. Lets see what he does tomorrow. Ill post pics tomorrow.
Appreciate 0
      07-22-2008, 07:58 PM   #21
s2kdagjd
Lieutenant
s2kdagjd's Avatar
48
Rep
468
Posts

Drives: G05 M50i
Join Date: Dec 2007
Location: OC

iTrader: (5)

Quote:
Originally Posted by O-cha View Post
Right, that's what I thought you meant, in which case revert back to my original comment, it's just not going to fit properly, the only reason aftermarket exhausts fit is from the flexibility of the clamps.


Anyone who has installed more than a few exhausts will tell you that. Some companies make exhausts that fit like OEM, unfortunately 90% do not.

You said your "muffler" guy will buy you a new exhaust? Then let him do it, but to get it to fit well hes going to have to do some fabrication guaranteed.

Oh Boy....Here comes O-cha
Appreciate 0
      07-22-2008, 10:03 PM   #22
BavarianBullet
Lieutenant
BavarianBullet's Avatar
United_States
18
Rep
429
Posts

Drives: 2014 Audi S5
Join Date: Jul 2008
Location: Connecticut

iTrader: (1)

By slip joints are you saying these aftermarket exhausts actually have pipe unions (ie double female short piece of pipe) to join two other pipes? That seems odd.

You don't have to weld anything unless you plan on leaving on there for 10 years and never touching it. If you want a leak-free exhaust you can just put some copper permatex RTV as it seals exhaust just fine and won't melt etc. I've seen it used on headers with good results.

http://www.permatex.com/products/Aut...sket_Maker.htm

For the cleanest look (for those that like to get under your car and check out your exhaust) I guess welding is an option but there are some different exhaust clamps that are a lot nicer than the old fashioned "U" clamps and might help.
__________________
2014 Audi S5 DSG
2011 335xi Sedan (retired)
2008 335xi Sedan (retired)
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 08:50 PM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST