North American 335d Post DPF Removal Exhaust Ideas

GreekboyD · 07-13-2014, 11:41 AM

For those of you that have removed the DPF and added a DP, what exhaust ideas have you done or are considering?

I've heard of going from the DP right into an x-type straight exhaust and removing the mufflers.

What are you guys thinking exhaust wise?

BB_cuda · 07-13-2014, 02:55 PM

Greek, you are definitely a mind reader. I still haven't found that guy's post of the all 3" SS exhaust. Axle asked him how much and he said $800 and Axel got same quoted for ~$550 if i have my facts straight. It was about 3 months ago, i believe. He had it done in Maryland. I think he had either 4.25" or 4.5" diameter exhaust tips.

Maybe a road trip to Maryland for exhaust and VAC (Quaife). I almost sure I could find a good custom exhaust fabricator in Houston or at least Texas before I put 3000 miles on the car though.

Quaife is on the list but at a lower priority.

2deerwhistlers · 07-13-2014, 03:34 PM

Did I just find my next project? I'd be willing to build a 3" set up, you provide your own tips

GreekboyD · 07-13-2014, 03:45 PM

Quote:

Originally Posted by BB_cuda

Greek, you are definitely a mind reader. I still haven't found that guy's post of the all 3" SS exhaust. Axle asked him how much and he said $800 and Axel got same quoted for ~$550 if i have my facts straight. It was about 3 months ago, i believe. He had it done in Maryland. I think he had either 4.25" or 4.5" diameter exhaust tips.

Maybe a road trip to Maryland for exhaust and VAC (Quaife). I almost sure I could find a good custom exhaust fabricator in Houston or at least Texas before I put 3000 miles on the car though.

Quaife is on the list but at a lower priority.

Exactly man. Hopefully this thread provides some ideas that maximize the best gains (exhaust set-ups) for our 335d vehicles.

BB_cuda · 07-13-2014, 04:16 PM

I searched back 10 pages into this forum. I never found the guy i was looking for. His post is possibly embedded into another thread. I did find a member maned Rev335 that got 4" tips (made by Proflow) installed. The thread says DPF back exhaust so perhaps its him but pics are elsewhere.

2deer, your offer sounds interesting. I will have to think long and hard before doing a round trip to/from Albany, NY though. I'm 5 miles from Galveston bay :-)

GreekboyD · 07-13-2014, 04:19 PM

What are you guys looking for? Straight pipe set-up right from the DP? Something different?

DieselRacer · 07-13-2014, 06:29 PM

I have built 2 ss pipes for a tdi, 2.5 inch from turbo back, next to my car lot in mesa az is a muffler shop the guys are wizards, its about $700 and the pipes will be perfect...

GreekboyD · 07-13-2014, 07:03 PM

Quote:

Originally Posted by BB_cuda

I searched back 10 pages into this forum. I never found the guy i was looking for. His post is possibly embedded into another thread. I did find a member maned Rev335 that got 4" tips (made by Proflow) installed. The thread says DPF back exhaust so perhaps its him but pics are elsewhere.

2deer, your offer sounds interesting. I will have to think long and hard before doing a round trip to/from Albany, NY though. I'm 5 miles from Galveston bay :-)

This one?:

Link

2deerwhistlers · 07-13-2014, 07:46 PM

Quote:

Originally Posted by BB_cuda

I searched back 10 pages into this forum. I never found the guy i was looking for. His post is possibly embedded into another thread. I did find a member maned Rev335 that got 4" tips (made by Proflow) installed. The thread says DPF back exhaust so perhaps its him but pics are elsewhere.

2deer, your offer sounds interesting. I will have to think long and hard before doing a round trip to/from Albany, NY though. I'm 5 miles from Galveston bay :-)

Why would I need the car? I have my own.. If it fits my car it fits yours right?.. Not much different than the downpipe..

GreekboyD · 07-13-2014, 07:57 PM

Quote:

Originally Posted by 2deerwhistlers

Why would I need the car? I have my own.. If it fits my car it fits yours right?.. Not much different than the downpipe..

I think shipping an entire exhaust system might be $$$$.

2deerwhistlers · 07-13-2014, 08:49 PM

Quote:

Originally Posted by GreekboyD

Quote:

Originally Posted by 2deerwhistlers

Why would I need the car? I have my own.. If it fits my car it fits yours right?.. Not much different than the downpipe..

I think shipping an entire exhaust system might be $$$$.

We do it for diesel pick ups all the time and that's bigger

GreekboyD · 07-13-2014, 08:56 PM

Quote:

Originally Posted by 2deerwhistlers

We do it for diesel pick ups all the time and that's bigger

Interesting. I thought shipping would be very high.

Do you have any design ideas for a 335d exhaust set-up?

GreekboyD · 07-14-2014, 04:29 PM

Turbo-back vs cat-back exhaust systems:

Link

Exhaust Design:

Link

2deerwhistlers · 07-14-2014, 04:43 PM

I'll have a better idea of exhaust design on Saturday when I put my car up on the lift

GreekboyD · 07-14-2014, 05:44 PM

Quote:

Originally Posted by 2deerwhistlers

I'll have a better idea of exhaust design on Saturday when I put my car up on the lift

Sweet.

BayE30 · 07-14-2014, 08:13 PM

i like where this thread is going. just wish i didnt live in smog nazi land.

Puerto Rican 335d · 07-15-2014, 08:51 AM

I have my exhaust guy doing my work but wont be till next month or so we're going 3'' from the downpipe till end at a cost of $550 not stainless steel though to expensive that way

GreekboyD · 07-15-2014, 11:02 AM

Quote:

Originally Posted by Puerto Rican 335d

I have my exhaust guy doing my work but wont be till next month or so we're going 3'' from the downpipe till end at a cost of $550 not stainless steel though to expensive that way

Where I live with the winter salt we see, SS is a must.

AzureHaze · 07-15-2014, 11:18 AM

Quote:

Originally Posted by SF335DIESEL

i like where this thread is going. just wish i didnt live in smog nazi land.

You said it. CA needs to cut some slack on the diesels!

Hoooper · 07-15-2014, 11:22 AM

you guys should at least consider a pipe bigger than 3". I wouldnt be surprised if 3.5" is the right size for our application. Sadly the only way to test that would be to build two exhausts and test them back to back.

Quote:

Originally Posted by SF335DIESEL

i like where this thread is going. just wish i didnt live in smog nazi land.

bug ecotune about getting their tune to trick the monitors. If they did that, you could get away with it in CA. It really shouldnt be that hard either if they just made the attempt. Once you get past the OBD test, its just visual on diesel and there is no way the smog tech would notice the DPF delete since the turbos pretty much block the above view and the undertray blocks the below view.

GreekboyD · 07-15-2014, 11:56 AM

That's exactly what I was thinking Hoooper. What might be ideal for one type of car might be more restrictive on another. So 3" or 3.5" is the question.

I'm far from an expert when it comes to exhaust set-ups so perhaps someone else with more experience can chime in.

iaknown · 07-15-2014, 12:55 PM

Quote:

Originally Posted by GreekboyD

That's exactly what I was thinking Hoooper. What might be ideal for one type of car might be more restrictive on another. So 3" or 3.5" is the question.

I'm far from an expert when it comes to exhaust set-ups so perhaps someone else with more experience can chime in.

Downpipe diameter is 3". And according to tdi's research of the midpipe done prior, smallest section of the factory midpipe is 3". I highly doubt we need anything larger than 3" though but would be curious of the results.

The exhaust I am building will go from 3" to dual 2.5" pipes....

07-13-2014, 11:41 AM	#1
GreekboyD Brigadier General 416 Rep 3,051 Posts Drives: 2009 BMW 335d Join Date: Jan 2012 Location: Toronto, ON, Canada iTrader: (0) Garage List 2009 BMW 335d [8.00]	North American 335d Post DPF Removal Exhaust Ideas For those of you that have removed the DPF and added a DP, what exhaust ideas have you done or are considering? I've heard of going from the DP right into an x-type straight exhaust and removing the mufflers. What are you guys thinking exhaust wise?
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07-13-2014, 02:55 PM	#2
BB_cuda Brigadier General 796 Rep 3,572 Posts Drives: 2011 335D Msport, 2013 X5D Join Date: Nov 2011 Location: Clear Lake, Texas iTrader: (0)	Greek, you are definitely a mind reader. I still haven't found that guy's post of the all 3" SS exhaust. Axle asked him how much and he said $800 and Axel got same quoted for ~$550 if i have my facts straight. It was about 3 months ago, i believe. He had it done in Maryland. I think he had either 4.25" or 4.5" diameter exhaust tips. Maybe a road trip to Maryland for exhaust and VAC (Quaife). I almost sure I could find a good custom exhaust fabricator in Houston or at least Texas before I put 3000 miles on the car though. Quaife is on the list but at a lower priority.
	Appreciate 0 Quote

07-13-2014, 03:34 PM	#3
2deerwhistlers Banned 109 Rep 429 Posts Drives: 335d Join Date: Jan 2014 Location: Albany NY iTrader: (0)	Did I just find my next project? I'd be willing to build a 3" set up, you provide your own tips
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07-13-2014, 04:16 PM	#5
BB_cuda Brigadier General 796 Rep 3,572 Posts Drives: 2011 335D Msport, 2013 X5D Join Date: Nov 2011 Location: Clear Lake, Texas iTrader: (0)	I searched back 10 pages into this forum. I never found the guy i was looking for. His post is possibly embedded into another thread. I did find a member maned Rev335 that got 4" tips (made by Proflow) installed. The thread says DPF back exhaust so perhaps its him but pics are elsewhere. 2deer, your offer sounds interesting. I will have to think long and hard before doing a round trip to/from Albany, NY though. I'm 5 miles from Galveston bay :-)
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07-13-2014, 04:19 PM	#6
GreekboyD Brigadier General 416 Rep 3,051 Posts Drives: 2009 BMW 335d Join Date: Jan 2012 Location: Toronto, ON, Canada iTrader: (0) Garage List 2009 BMW 335d [8.00]	What are you guys looking for? Straight pipe set-up right from the DP? Something different?
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07-13-2014, 06:29 PM	#7
DieselRacer BMW Advanced Diesel, 2011 BMW 335d M sport... 95 Rep 783 Posts Drives: 2011 335d M sport Join Date: Apr 2014 Location: AZ-NV iTrader: (0) Garage List 1965 shelby cobra ford [0.00] 1965 Shelby Cobra [0.00] 2011 BMW 335d M sport [0.00]	I have built 2 ss pipes for a tdi, 2.5 inch from turbo back, next to my car lot in mesa az is a muffler shop the guys are wizards, its about $700 and the pipes will be perfect... __________________ BMW Advanced Diesel, 2011 335d M sport...
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07-14-2014, 04:29 PM	#13
GreekboyD Brigadier General 416 Rep 3,051 Posts Drives: 2009 BMW 335d Join Date: Jan 2012 Location: Toronto, ON, Canada iTrader: (0) Garage List 2009 BMW 335d [8.00]	Turbo-back vs cat-back exhaust systems: Link Exhaust Design: Link
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07-14-2014, 04:43 PM	#14
2deerwhistlers Banned 109 Rep 429 Posts Drives: 335d Join Date: Jan 2014 Location: Albany NY iTrader: (0)	I'll have a better idea of exhaust design on Saturday when I put my car up on the lift
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07-14-2014, 08:13 PM	#16
BayE30 Lieutenant Colonel 1347 Rep 1,882 Posts Drives: 2011.75 E90 M3 ZCP Join Date: Jul 2014 Location: San Francisco iTrader: (5)	i like where this thread is going. just wish i didnt live in smog nazi land.
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07-15-2014, 08:51 AM	#17
Puerto Rican 335d Brigadier General 236 Rep 3,488 Posts Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico(Dominican Republic 03/2017) iTrader: (0)	I have my exhaust guy doing my work but wont be till next month or so we're going 3'' from the downpipe till end at a cost of $550 not stainless steel though to expensive that way __________________ RENNtech Flash(Lenny Wu)/WAGNER IC Enkei Rajin 18"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack/Brava Synthetic Motor Oil(Made in Puerto Rico)/Meth(in the works)/CBU done w Andrew EGR Race Pipe (whoa! what an animal it is now)
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07-15-2014, 11:56 AM	#21
GreekboyD Brigadier General 416 Rep 3,051 Posts Drives: 2009 BMW 335d Join Date: Jan 2012 Location: Toronto, ON, Canada iTrader: (0) Garage List 2009 BMW 335d [8.00]	That's exactly what I was thinking Hoooper. What might be ideal for one type of car might be more restrictive on another. So 3" or 3.5" is the question. I'm far from an expert when it comes to exhaust set-ups so perhaps someone else with more experience can chime in.
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