Different catless DPs out there?

Chard · 07-19-2010, 08:08 PM

Hey All,

I'm new to the forum, will be taking delivery of my 335i this week

I have a question about catless downpipes...what brands are out there? I have seen ar design, any others? I'm looking for the best bang the buck.

Also, since the ar design is 3" all the way through, how do the flanges mate with the stock turbos & exhaust?

tia for all your help!

Chard

Forcefed3 · 07-19-2010, 08:10 PM

lazy ^^^

http://lmgtfy.com/?q=335i+downpipes

Chard · 07-19-2010, 08:16 PM

...where are the google results?

Bakeme521 · 07-19-2010, 08:44 PM

CPE, Active, Raceland...just to name some off the top of my head

Forcefed3 · 07-19-2010, 08:47 PM

there is 5 different brands on the page i sent you.

Forcefed3 · 07-19-2010, 08:47 PM

although, i would go with AR

Chard · 07-19-2010, 08:55 PM

ah, ok. I was mainly looking for installation tips. What is the stock exhaust diameter? not 3", right? I just want to make sure these would bolt up to the stock exhaust as I plan to keep it for now.

Man, these pipes are expensive!

Forcefed3 · 07-19-2010, 08:57 PM

2.5" every downpipe that ive ever seen fits stock exhaust.

supracg · 07-19-2010, 08:58 PM

Quote:

Originally Posted by Chard

ah, ok. I was mainly looking for installation tips. What is the stock exhaust diameter? not 3", right? I just want to make sure these would bolt up to the stock exhaust as I plan to keep it for now.

Man, these pipes are expensive!

haha welcome to bmw's man

Chard · 07-19-2010, 09:01 PM

Quote:

Originally Posted by gbreeE90

2.5" every downpipe that ive ever seen fits stock exhaust.

Cool, just curious how a 3" flange (on the dp) mates to the 2.5" flange of the stock exhaust. Isn't there an extra 1/4" on each side?

Quote:

Originally Posted by supracg

haha welcome to bmw's man

Haha. I used to have a pretty modded Audi A4, but since it was a 1.8tq, I only needed 1 of everything when it came to the exhaust.

Forcefed3 · 07-19-2010, 09:07 PM

they narrow down where they meet. Atleast thats what ive read.

Chard · 07-19-2010, 09:10 PM

OK, makes sense. Their advertising confused me for a sec:

"The only TRUE 3" catless downpipes currently on the market! 3" tubing until cat-back flange - all systems currently on the market reduce to 2.5" much closer to the turbocharger."

I guess that means it tapers down at the flanges, but other brands taper down right before the flanges? Anyway, if I don't need anything special to bolt them up, that's all I needed to know. Thanks

07-19-2010, 08:08 PM	#1
Chard Second Lieutenant 16 Rep 242 Posts Drives: E90 330i Join Date: Mar 2010 Location: Honolulu iTrader: (3)	Different catless DPs out there? Hey All, I'm new to the forum, will be taking delivery of my 335i this week I have a question about catless downpipes...what brands are out there? I have seen ar design, any others? I'm looking for the best bang the buck. Also, since the ar design is 3" all the way through, how do the flanges mate with the stock turbos & exhaust? tia for all your help! Chard
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07-19-2010, 08:10 PM	#2
Forcefed3 Banned 131 Rep 4,732 Posts Drives: 2008 335i Join Date: May 2010 Location: South iTrader: (2) Garage List 2008 335i [1.00]	lazy ^^^ http://lmgtfy.com/?q=335i+downpipes
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07-19-2010, 08:16 PM	#3
Chard Second Lieutenant 16 Rep 242 Posts Drives: E90 330i Join Date: Mar 2010 Location: Honolulu iTrader: (3)	...where are the google results?
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07-19-2010, 08:44 PM	#4
Bakeme521 Some say... 251 Rep 4,296 Posts Drives: Fresh Join Date: Mar 2010 Location: Baton Rouge n NOLA iTrader: (12) Garage List 2007 BMW 335i [8.24]	CPE, Active, Raceland...just to name some off the top of my head __________________ I have exhaust and an intake...
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07-19-2010, 08:47 PM	#5
Forcefed3 Banned 131 Rep 4,732 Posts Drives: 2008 335i Join Date: May 2010 Location: South iTrader: (2) Garage List 2008 335i [1.00]	there is 5 different brands on the page i sent you.
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07-19-2010, 08:55 PM	#7
Chard Second Lieutenant 16 Rep 242 Posts Drives: E90 330i Join Date: Mar 2010 Location: Honolulu iTrader: (3)	ah, ok. I was mainly looking for installation tips. What is the stock exhaust diameter? not 3", right? I just want to make sure these would bolt up to the stock exhaust as I plan to keep it for now. Man, these pipes are expensive!
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07-19-2010, 08:57 PM	#8
Forcefed3 Banned 131 Rep 4,732 Posts Drives: 2008 335i Join Date: May 2010 Location: South iTrader: (2) Garage List 2008 335i [1.00]	2.5" every downpipe that ive ever seen fits stock exhaust.
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07-19-2010, 09:07 PM	#11
Forcefed3 Banned 131 Rep 4,732 Posts Drives: 2008 335i Join Date: May 2010 Location: South iTrader: (2) Garage List 2008 335i [1.00]	they narrow down where they meet. Atleast thats what ive read.
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07-19-2010, 09:10 PM	#12
Chard Second Lieutenant 16 Rep 242 Posts Drives: E90 330i Join Date: Mar 2010 Location: Honolulu iTrader: (3)	OK, makes sense. Their advertising confused me for a sec: "The only TRUE 3" catless downpipes currently on the market! 3" tubing until cat-back flange - all systems currently on the market reduce to 2.5" much closer to the turbocharger." I guess that means it tapers down at the flanges, but other brands taper down right before the flanges? Anyway, if I don't need anything special to bolt them up, that's all I needed to know. Thanks
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