Downpipe Flanges

BSM n54iS · 09-11-2020, 08:57 PM

Is it customary for the flanges on catless downpipes to be welded on the inside? Not sure if this is a weird question or not..

feuer · 09-12-2020, 02:15 AM

Usually is on the outside. I don’t recall seeing any welded on the inside. Not talking about bmw only. Exhaust flanges in general

BSM n54iS · 09-12-2020, 11:42 AM

I'm super picky/OCD on certain things, my car being one unfortunately. It's eating at me inside that one is not like the other on this center exhaust flange now lol. Maybe if I offer to pay for shipping just to get the other one welded inside and pretty to match that would be fair?

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BSM n54iS · 09-13-2020, 10:22 PM

Sooo I'm the only one that gets irked by this I guess... what's wrong with me? lol

_N54 · 09-14-2020, 12:34 AM

The pipes are 2 different angles. The one on the right is angled different to fit the mid pipe and so is the one on the left thats why the welds are in different spots. Look at the angles on both pipes and where it's welded on the outside.

Install them and enjoy it.

Jeef · 09-14-2020, 08:28 AM

they look nice, AR downpipes?

Soden82 · 09-14-2020, 08:58 AM

That's how mine are. Confirmed with a vendor that it is normal

BSM n54iS · 09-14-2020, 10:55 AM

Quote:

Originally Posted by ///S58

The pipes are 2 different angles. The one on the right is angled different to fit the mid pipe and so is the one on the left thats why the welds are in different spots. Look at the angles on both pipes and where it's welded on the outside.

Install them and enjoy it.

I'm not sure how does fitting up to the exhaust mid pipe have to do with welding the flanges on the inside or not? Like one pipe is completely welded inside through the entire circumference whereas the other is completely not.

Quote:

Originally Posted by Jeef

they look nice, AR downpipes?

AR resonated, yes. And they are beautiful except this one little difference is killing me.

Quote:

Originally Posted by Soden82

That's how mine are. Confirmed with a vendor that it is normal

I'm so confused, you confirmed with a vendor that the rear downpipe center exhaust flange is welded on the inside but the front downpipe exhaust center flange isn't welded on the inside? I looked all over FB and saw all their dp's they show off has been welded everywhere including inside the flange connections that's why I'm not like wth you know

_N54 · 09-14-2020, 12:24 PM

Look at their product page. The welds are the same as the picture you posted.

http://ardownpipes.com/bmw-n54-1m-135i-335i-downpipes/

BSM n54iS · 09-14-2020, 12:47 PM

Quote:

Originally Posted by ///S58

Look at their product page. The welds are the same as the picture you posted.

http://ardownpipes.com/bmw-n54-1m-135i-335i-downpipes/

I have to disagree sorry, that's what I'm talking about you can clearly see they are welded inside the flange.

http://ardownpipes.com/bmw-n54-135i-...ted-downpipes/

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BSM n54iS · 09-14-2020, 01:29 PM

I called Tommy up at AR and talked for a few minutes. Awesome customer service! Great support even for a pia like myself

He explained all downpipes that are being slid on to the exhaust would have the welding done on the inside just to make a good connection, but for being bolted up unless there is significant overhang or welding slag they are not typically welded on the inside.

He is more than happy to accommodate me still so I'll just cover the extra shipping since it's not essential, but will make me feel all warm and fuzzy inside.

stewbets · 09-14-2020, 02:16 PM

I think you're crazy

BSM n54iS · 09-14-2020, 03:00 PM

Quote:

Originally Posted by stewbets

I think you're crazy

No doubting that

09-11-2020, 08:57 PM	#1
BSM n54iS Brigadier General 2680 Rep 4,203 Posts Drives: '11 335is \| '16 Macan Turbo Join Date: Aug 2015 Location: Everywhere and Nowhere iTrader: (7)	Downpipe Flanges Is it customary for the flanges on catless downpipes to be welded on the inside? Not sure if this is a weird question or not.. __________________ '11 335is BSM MT "BMW Performance Editon" \| '16 Porsche Macan Turbo GruppeM CF Intake \| AR Resonated DP \| ER CP \| Turbosmart RacePort BOV \| Cobb FMIC \| RB Inlets \| RB External Mishi/Turner OCC \| Michelin PS4 \| BMW Performance Springs/Bilstein B8 + Dinan & M3 bits \| BMW Brembo BBK \| BMW Performance CF Spoiler \| BMW Performance CF Lip \| BMW Performance Alcantara \| PS Designs GTS Armrest \| AG H6-40 \| Rear Seat Delete
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09-12-2020, 02:15 AM	#2
feuer Major General 4283 Rep 9,216 Posts Drives: wife crazy! Join Date: Apr 2015 Location: Chicago, IL iTrader: (5)	Usually is on the outside. I don’t recall seeing any welded on the inside. Not talking about bmw only. Exhaust flanges in general
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09-12-2020, 11:42 AM	#3
BSM n54iS Brigadier General 2680 Rep 4,203 Posts Drives: '11 335is \| '16 Macan Turbo Join Date: Aug 2015 Location: Everywhere and Nowhere iTrader: (7)	I'm super picky/OCD on certain things, my car being one unfortunately. It's eating at me inside that one is not like the other on this center exhaust flange now lol. Maybe if I offer to pay for shipping just to get the other one welded inside and pretty to match that would be fair? __________________ '11 335is BSM MT "BMW Performance Editon" \| '16 Porsche Macan Turbo GruppeM CF Intake \| AR Resonated DP \| ER CP \| Turbosmart RacePort BOV \| Cobb FMIC \| RB Inlets \| RB External Mishi/Turner OCC \| Michelin PS4 \| BMW Performance Springs/Bilstein B8 + Dinan & M3 bits \| BMW Brembo BBK \| BMW Performance CF Spoiler \| BMW Performance CF Lip \| BMW Performance Alcantara \| PS Designs GTS Armrest \| AG H6-40 \| Rear Seat Delete
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09-13-2020, 10:22 PM	#4
BSM n54iS Brigadier General 2680 Rep 4,203 Posts Drives: '11 335is \| '16 Macan Turbo Join Date: Aug 2015 Location: Everywhere and Nowhere iTrader: (7)	Sooo I'm the only one that gets irked by this I guess... what's wrong with me? lol __________________ '11 335is BSM MT "BMW Performance Editon" \| '16 Porsche Macan Turbo GruppeM CF Intake \| AR Resonated DP \| ER CP \| Turbosmart RacePort BOV \| Cobb FMIC \| RB Inlets \| RB External Mishi/Turner OCC \| Michelin PS4 \| BMW Performance Springs/Bilstein B8 + Dinan & M3 bits \| BMW Brembo BBK \| BMW Performance CF Spoiler \| BMW Performance CF Lip \| BMW Performance Alcantara \| PS Designs GTS Armrest \| AG H6-40 \| Rear Seat Delete
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09-14-2020, 12:34 AM	#5
_N54 Captain 302 Rep 884 Posts Drives: 335d Join Date: Mar 2020 Location: USA iTrader: (0)	The pipes are 2 different angles. The one on the right is angled different to fit the mid pipe and so is the one on the left thats why the welds are in different spots. Look at the angles on both pipes and where it's welded on the outside. Install them and enjoy it. __________________ 2013 335is - sold 2011 335d
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09-14-2020, 08:28 AM	#6
Jeef Lieutenant Colonel 389 Rep 1,943 Posts Drives: AW E92 335i Join Date: Nov 2008 Location: San Diego, CA iTrader: (6)	they look nice, AR downpipes?
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09-14-2020, 08:58 AM	#7
Soden82 Major 491 Rep 1,217 Posts Drives: 2011 BMW M3 Join Date: Jun 2017 Location: Boston iTrader: (1) Garage List 2011 BMW M3 [0.00]	That's how mine are. Confirmed with a vendor that it is normal __________________ 2009 BMW 335i 6MT big single (eventually) For now... MHD tuned VRSF Race IC DCI ATM exhaust
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09-14-2020, 12:24 PM	#9
_N54 Captain 302 Rep 884 Posts Drives: 335d Join Date: Mar 2020 Location: USA iTrader: (0)	Look at their product page. The welds are the same as the picture you posted. http://ardownpipes.com/bmw-n54-1m-135i-335i-downpipes/ __________________ 2013 335is - sold 2011 335d
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09-14-2020, 01:29 PM	#11
BSM n54iS Brigadier General 2680 Rep 4,203 Posts Drives: '11 335is \| '16 Macan Turbo Join Date: Aug 2015 Location: Everywhere and Nowhere iTrader: (7)	I called Tommy up at AR and talked for a few minutes. Awesome customer service! Great support even for a pia like myself He explained all downpipes that are being slid on to the exhaust would have the welding done on the inside just to make a good connection, but for being bolted up unless there is significant overhang or welding slag they are not typically welded on the inside. He is more than happy to accommodate me still so I'll just cover the extra shipping since it's not essential, but will make me feel all warm and fuzzy inside. __________________ '11 335is BSM MT "BMW Performance Editon" \| '16 Porsche Macan Turbo GruppeM CF Intake \| AR Resonated DP \| ER CP \| Turbosmart RacePort BOV \| Cobb FMIC \| RB Inlets \| RB External Mishi/Turner OCC \| Michelin PS4 \| BMW Performance Springs/Bilstein B8 + Dinan & M3 bits \| BMW Brembo BBK \| BMW Performance CF Spoiler \| BMW Performance CF Lip \| BMW Performance Alcantara \| PS Designs GTS Armrest \| AG H6-40 \| Rear Seat Delete
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09-14-2020, 02:16 PM	#12
stewbets Captain 451 Rep 823 Posts Drives: '08 335xi, '04 545i Join Date: Sep 2019 Location: Dayton, OH iTrader: (0)	I think you're crazy __________________ 2008 335xi 6MT - 16T China Turbskies - eBay FMIC, DP & CP - VRSF Inlets - SSR DCI's - Walbro 450 LPFP - RFP e85 Tune
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