Downpipe

itschuto · 12-06-2017, 05:10 AM

Hey guys i want to put a downpipe on my car but i dont want the horrendous smell of fumes all the time...
do catted downpipes smell like this?
How much HP can a catted downpipe add? And will it make my car louder? Please help!

G.Newt · 12-06-2017, 10:32 AM

My CG DS-1 smells. You're still letting more exhaust gasses through than stock downpipe...
And of course it will make your car louder. Probably a little less hp than a catless.

itschuto · 12-06-2017, 10:33 AM

Quote:

Originally Posted by G.Newt

My CG DS-1 smells. You're still letting more exhaust gasses through than stock downpipe...
And of course it will make your car louder. Probably a little less hp than a catless.

Is the smell really bad? Like is it unbearable? Will it still pass all those EPA tests?

kern417 · 12-06-2017, 11:48 AM

Quote:

Originally Posted by david340i

Is the smell really bad? Like is it unbearable? Will it still pass all those EPA tests?

No, No, and it depends on your state's test procedures. It's a good idea to keep your stock downpipe and swap it back at inspection time.

itschuto · 12-06-2017, 11:49 AM

Quote:

Originally Posted by kern417

Quote:

Originally Posted by david340i

Is the smell really bad? Like is it unbearable? Will it still pass all those EPA tests?

No, No, and it depends on your state's test procedures. It's a good idea to keep your stock downpipe and swap it back at inspection time.

How much did you get your dp for?

eluded · 12-07-2017, 01:33 AM

The smell isn't that bad unless the windows are down and a breeze is blowing the right direction, back to front. Then it's pretty noticeable. The car will actually sound a lot better and should have a bit more power although on these engines I believe you see the boost over spike or something to see you actually see a dip at 3K. Somebody please correct me if I'm wrong.

Most of these vehicles with downpipes should fail emissions although some people get theirs to pa$$ every time.

iMinLuv · 12-07-2017, 07:26 AM

Quote:

Originally Posted by eluded

The smell isn't that bad unless the windows are down and a breeze is blowing the right direction, back to front. Then it's pretty noticeable. The car will actually sound a lot better and should have a bit more power although on these engines I believe you see the boost over spike or something to see you actually see a dip at 3K. Somebody please correct me if I'm wrong.

Most of these vehicles with downpipes should fail emissions although some people get theirs to pa$$ every time.

I have catless and I don't notice much of anything

viperstang1 · 12-07-2017, 09:08 AM

i only noticed a smell in map 3....all other maps there is no smell

kern417 · 12-07-2017, 11:47 AM

OP is asking about catted downpipes though. I've gone from catted to catless and it was noticeable though it didn't bother me. But with the catted downpipe I didn't smell anything at all.

Quote:

Originally Posted by david340i

How much did you get your dp for?

just keep an eye on the forums. You can find them for $300-$400.

itschuto · 12-07-2017, 05:05 PM

Quote:

Originally Posted by kern417

OP is asking about catted downpipes though. I've gone from catted to catless and it was noticeable though it didn't bother me. But with the catted downpipe I didn't smell anything at all.

Quote:

Originally Posted by david340i

How much did you get your dp for?

just keep an eye on the forums. You can find them for $300-$400.

Thank you

G.Newt · 12-07-2017, 08:02 PM

Quote:

Originally Posted by david340i

Is the smell really bad? Like is it unbearable? Will it still pass all those EPA tests?

I've had it on for thousands of miles without a CEL. No, I don't really smell it unless I walk to the rear of the car while it's running or immediately after it's been turned off.
You'd have to check your local state and county's emissions requirements.

eluded · 12-08-2017, 01:25 AM

Quote:

Originally Posted by iMinLuv

I have catless and I don't notice much of anything.

Exactly, I have no idea what you're talking about officer. It came this way right out of the factory.

Mike@N54Tuning.com · 12-13-2017, 11:59 AM

Quote:

Originally Posted by iMinLuv

I have catless and I don't notice much of anything

+2

It really shouldn't smell unless you are overly sensitive to it.

Mike

itschuto · 12-14-2017, 12:23 AM

Quote:

Originally Posted by Mike@N54Tuning.com

Quote:

Originally Posted by iMinLuv

I have catless and I don't notice much of anything

+2

It really shouldn't smell unless you are overly sensitive to it.

Mike

Whats the best downpipe to buy?

Frank Jia · 12-14-2017, 06:01 AM

I just sold my ER catless downpipe and I will never have any decat pipe anymore. Too smelly and noisy (no good but just loud &poor sound) for me. It also makes my car not smooth. It will cause terrible throttle closure problem even with jb4 ewg. Never go decat just buy a highflow downpipe.

CruzM3 · 12-14-2017, 08:13 AM

Anybody have the Fabspeed catted downpipe? I'm thinking about picking it up. Kinda pricey though.

Mike@N54Tuning.com · 12-14-2017, 11:55 AM

Quote:

Originally Posted by david340i

Whats the best downpipe to buy?

For B58 I would rank the ER very high on the list if not at the top. Large diameter, great build quality, etc.. If looking for catted ER supplies some very high quality cats on their pipes as well.

Mike

mike@x-ph.com · 12-14-2017, 07:11 PM

Quote:

Originally Posted by david340i

Whats the best downpipe to buy?

We offer Evolution Racewerks, VRFS & VM Downpipes

First 2 options are more popular since they are 4.5" vs 4.0" on the VM

Quote:

Originally Posted by Cruz28/40

Anybody have the Fabspeed catted downpipe? I'm thinking about picking it up. Kinda pricey though.

Fabspeed do not sell their own B58 downpipe.
They sell the HJS pipe which is 300 CEL, waste of money in my opinion since it is to restrictive

itschuto · 01-05-2018, 05:04 PM

Quote:

Originally Posted by Frank Jia

I just sold my ER catless downpipe and I will never have any decat pipe anymore. Too smelly and noisy (no good but just loud &poor sound) for me. It also makes my car not smooth. It will cause terrible throttle closure problem even with jb4 ewg. Never go decat just buy a highflow downpipe.

Quote:

Originally Posted by Frank Jia

I just sold my ER catless downpipe and I will never have any decat pipe anymore. Too smelly and noisy (no good but just loud &poor sound) for me. It also makes my car not smooth. It will cause terrible throttle closure problem even with jb4 ewg. Never go decat just buy a highflow downpipe.

Im assuming highflow is a catted downpipe? I really dont care for the sound, I honestly dont want my car to be loud anymore. My res delete is perfect for me. I just want HP gainzzz

itschuto · 01-05-2018, 05:05 PM

Quote:

Originally Posted by mike@x-ph.com

Quote:

Originally Posted by david340i

Whats the best downpipe to buy?

We offer Evolution Racewerks, VRFS & VM Downpipes

First 2 options are more popular since they are 4.5" vs 4.0" on the VM

Quote:

Originally Posted by Cruz28/40

Anybody have the Fabspeed catted downpipe? I'm thinking about picking it up. Kinda pricey though.

Fabspeed do not sell their own B58 downpipe.
They sell the HJS pipe which is 300 CEL, waste of money in my opinion since it is to restrictive

Quote:

Originally Posted by Frank Jia

I just sold my ER catless downpipe and I will never have any decat pipe anymore. Too smelly and noisy (no good but just loud &poor sound) for me. It also makes my car not smooth. It will cause terrible throttle closure problem even with jb4 ewg. Never go decat just buy a highflow downpipe.

Quote:

Originally Posted by mike@x-ph.com

Quote:

Originally Posted by david340i

Whats the best downpipe to buy?

We offer Evolution Racewerks, VRFS & VM Downpipes

First 2 options are more popular since they are 4.5" vs 4.0" on the VM

Quote:

Originally Posted by Cruz28/40

Anybody have the Fabspeed catted downpipe? I'm thinking about picking it up. Kinda pricey though.

Fabspeed do not sell their own B58 downpipe.
They sell the HJS pipe which is 300 CEL, waste of money in my opinion since it is to restrictive

What im looking for is something that is (preferably) catted, wont make my car sound extremely loud, but will add HP. all i want is the HP back that has been robbed by the stock dp

mike@x-ph.com · 01-05-2018, 06:43 PM

Quote:

Originally Posted by david340i

What im looking for is something that is (preferably) catted, wont make my car sound extremely loud, but will add HP. all i want is the HP back that has been robbed by the stock dp

Get the Evolution Racewerks catted downpipe

itschuto · 01-05-2018, 06:43 PM

Quote:

Originally Posted by mike@x-ph.com

Quote:

Originally Posted by david340i

What im looking for is something that is (preferably) catted, wont make my car sound extremely loud, but will add HP. all i want is the HP back that has been robbed by the stock dp

Get the Evolution Racewerks catted downpipe

How much, sir?

12-06-2017, 05:10 AM	#1
itschuto Private 25 Rep 98 Posts Drives: BMW 340i Join Date: Oct 2017 Location: Glendale, Ca iTrader: (0)	Downpipe Hey guys i want to put a downpipe on my car but i dont want the horrendous smell of fumes all the time... do catted downpipes smell like this? How much HP can a catted downpipe add? And will it make my car louder? Please help!
	Appreciate 0 Tweet Quote

12-06-2017, 10:32 AM	#2
G.Newt Major 810 Rep 1,456 Posts Drives: CT4-V Blackwing 6MT Join Date: Feb 2017 Location: CO -> TX iTrader: (0)	My CG DS-1 smells. You're still letting more exhaust gasses through than stock downpipe... And of course it will make your car louder. Probably a little less hp than a catless. __________________ 2022 CT4-V Blackwing 6-speed SOLD: 2016 340i xDrive 6-speed DAW v2.5 turbo E40 \| Dorch S2 \| VRSF DP \| MST intake \| AWE catback \| 335is clutch \| CSF heat exchanger \| RK Autowerks intake manifold \| Orange M Perf Brake Kit \| KW Street Comfort coilovers \| GTS taillights V2
	Appreciate 0 Quote

12-07-2017, 01:33 AM	#6
eluded 2JZ-GTE 3066 Rep 4,013 Posts Drives: 340 6MT, 50e, others Join Date: Nov 2015 Location: Sofia iTrader: (0)	The smell isn't that bad unless the windows are down and a breeze is blowing the right direction, back to front. Then it's pretty noticeable. The car will actually sound a lot better and should have a bit more power although on these engines I believe you see the boost over spike or something to see you actually see a dip at 3K. Somebody please correct me if I'm wrong. Most of these vehicles with downpipes should fail emissions although some people get theirs to pa$$ every time. __________________ A man who views the world the same at 50 as he did at 20 has wasted 30 years of his life.
	Appreciate 0 Quote

12-07-2017, 09:08 AM	#8
viperstang1 New Member 2 Rep 14 Posts Drives: 340i, alpine white Join Date: May 2017 Location: new jersey iTrader: (0)	i only noticed a smell in map 3....all other maps there is no smell
	Appreciate 0 Quote

12-14-2017, 06:01 AM	#15
Frank Jia Private First Class 67 Rep 111 Posts Drives: BMW 340i MPPSK Join Date: Jun 2016 Location: Australia iTrader: (0)	I just sold my ER catless downpipe and I will never have any decat pipe anymore. Too smelly and noisy (no good but just loud &poor sound) for me. It also makes my car not smooth. It will cause terrible throttle closure problem even with jb4 ewg. Never go decat just buy a highflow downpipe.
	Appreciate 0 Quote

12-14-2017, 08:13 AM	#16
CruzM3 Captain 284 Rep 703 Posts Drives: 2018 M3 "Velocity Edition" Join Date: Apr 2016 Location: Düsseldorf, Germany iTrader: (0)	Anybody have the Fabspeed catted downpipe? I'm thinking about picking it up. Kinda pricey though. __________________ 2018 M3 ZCP "Edition Velocity" 2018 X3 30i (wife’s) 2017 340i w/ MPPSK & Many M Performance Parts (sold) 2016 328i (sold)
	Appreciate 0 Quote