E90Post
 


GetBMWParts
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > VK downpipes whats the deal?



Reply
 
Thread Tools Search this Thread
      09-10-2009, 08:53 AM   #1
john boxter
Captain
United_States
12
Rep
763
Posts

Drives: 2008 e93
Join Date: Sep 2009
Location: long Island New York

iTrader: (3)

VK downpipes whats the deal?

hey guys i am new to this forum and i may not know to much about downpipes but i know they shouldnt cost 300 or even 350 shipped to us why are these so cheap how do they hold up against other downpipes such as AR? thanks in advance for the replies!
Appreciate 0
      09-10-2009, 09:05 AM   #2
themyst
Major General
themyst's Avatar
South Korea
86
Rep
6,602
Posts

Drives: E90 335i LCI
Join Date: Feb 2009
Location: NYC

iTrader: (8)

Send a message via AIM to themyst
The 350 shipped was a group buy price, and for many of us, waited six months for them. These downpipes will cost around 450-500 supposedly once they are put on the market.
__________________
E90 LCI N54 6AT
Appreciate 0
      09-10-2009, 09:11 AM   #3
john boxter
Captain
United_States
12
Rep
763
Posts

Drives: 2008 e93
Join Date: Sep 2009
Location: long Island New York

iTrader: (3)

still the group buy price of the ar was 600!! double that
Appreciate 0
      09-10-2009, 09:27 AM   #4
Sal@AUTOcouture
Sal@AUTOcouture's Avatar
146
Rep
9,673
Posts

Drives: F80 M3
Join Date: Feb 2007
Location: NJ

iTrader: (29)

Send a message via AIM to Sal@AUTOcouture
there probably a reason for that
Appreciate 0
      09-10-2009, 09:31 AM   #5
Kevin@AKMotorwerk
General
Kevin@AKMotorwerk's Avatar
United_States
281
Rep
28,154
Posts

Drives: THE GUY YOU LOVE TO HATE
Join Date: Mar 2009
Location: hillsborough, nj

iTrader: (1)

i heard they are smaller diameter then the ar or riss but not sure
Appreciate 0
      09-10-2009, 09:36 AM   #6
john boxter
Captain
United_States
12
Rep
763
Posts

Drives: 2008 e93
Join Date: Sep 2009
Location: long Island New York

iTrader: (3)

ya that is true they are 2.5 inch you think its worth wasting our money on them or saving up for the better stuff?
Appreciate 0
      09-10-2009, 09:38 AM   #7
Former_Boosted_IS
Major General
143
Rep
5,179
Posts

Drives: 4 Wheels
Join Date: Aug 2007
Location: Planet Earth!

iTrader: (15)

2.5" all the way through on the VK. The AR DPs are 3" and taper to 2.5" within about 1-2" of the rear of the flange. It offers a lot more area to fill on spool.

This is going to open a can of worms though. The argument about Chinese built parts versus quality American built parts is about to explode in my opinion.
Appreciate 0
      09-10-2009, 09:39 AM   #8
Kevin@AKMotorwerk
General
Kevin@AKMotorwerk's Avatar
United_States
281
Rep
28,154
Posts

Drives: THE GUY YOU LOVE TO HATE
Join Date: Mar 2009
Location: hillsborough, nj

iTrader: (1)

Quote:
Originally Posted by Former_Boosted_IS View Post
2.5" all the way through on the VK. The AR DPs are 3" and taper to 2.5" within about 1-2" of the rear of the flange. It offers a lot more area to fill on spool.

This is going to open a can of worms though. The argument about Chinese built parts versus quality American built parts is about to explode in my opinion.
i have no experience installing vk dp's but i can say that the ar dp's are perfect fitment always, and just look better made then the other brands i have installed
Appreciate 0
      09-10-2009, 09:54 AM   #9
john boxter
Captain
United_States
12
Rep
763
Posts

Drives: 2008 e93
Join Date: Sep 2009
Location: long Island New York

iTrader: (3)

but i dont uderstand the importance of quality are we worried about the pipe just braking in half while driving? i think its fair to say thats a little unlikely right?
Appreciate 0
      09-10-2009, 09:59 AM   #10
TurboSid
Colonel
TurboSid's Avatar
37
Rep
2,273
Posts

Drives: 2015 M4 MW/SO DCT
Join Date: Apr 2008
Location: Florida

iTrader: (4)

Garage List
2008 335i  [0.00]
the vk pipes are just about to start getting out to the masses... it seems like u've done your research. imo you should wait just a little longer to see people's first impressions and first dyno results and then decide if buying them over AR or RR is right for you.
__________________


2015 MW/SO M4 M-DCT [CURRENT]
2011 AW/CR 335is DCT FBO [SOLD]
2008 AW/CR 335i 6MT FBO [SOLD]
Appreciate 0
      09-10-2009, 10:00 AM   #11
Former_Boosted_IS
Major General
143
Rep
5,179
Posts

Drives: 4 Wheels
Join Date: Aug 2007
Location: Planet Earth!

iTrader: (15)

Quote:
Originally Posted by john boxter View Post
but i dont uderstand the importance of quality are we worried about the pipe just braking in half while driving? i think its fair to say thats a little unlikely right?
You are talking about something that will be subject to 1100-1300F heat and changes in temperature in extremely short time periods of time. The stress DPs are put under is pretty extreme.
Appreciate 0
      09-10-2009, 10:01 AM   #12
Kevin@AKMotorwerk
General
Kevin@AKMotorwerk's Avatar
United_States
281
Rep
28,154
Posts

Drives: THE GUY YOU LOVE TO HATE
Join Date: Mar 2009
Location: hillsborough, nj

iTrader: (1)

Quote:
Originally Posted by john boxter View Post
but i dont uderstand the importance of quality are we worried about the pipe just braking in half while driving? i think its fair to say thats a little unlikely right?
its more of a fitment and flange quality importance, if the flanges are weak or made crappy then they may leak at the turbo, and if they are bent bad they may not fit easily
Appreciate 0
      09-10-2009, 10:11 AM   #13
Vince@ V K Motorwerks
Lieutenant Colonel
Vince@ V K Motorwerks's Avatar
51
Rep
1,739
Posts

Drives: 01 Black 911 Turbo, 09 X5
Join Date: May 2007
Location: Bloomingdale, IL

iTrader: (0)

Our orginal set was a 3inch tapering to a 2.5 right before the flange. We also tested the 2.5 inch the way we have it now. We did not see any gains with one over the other. The bottom line is that ALL the current downpipes are going to be 2.5inches at the flange. Please wait to have them first before you start saying that these are not high quality.
Appreciate 0
      09-10-2009, 10:25 AM   #14
Former_Boosted_IS
Major General
143
Rep
5,179
Posts

Drives: 4 Wheels
Join Date: Aug 2007
Location: Planet Earth!

iTrader: (15)

Quote:
Originally Posted by Vince@ V K Motorwerks View Post
Our orginal set was a 3inch tapering to a 2.5 right before the flange. We also tested the 2.5 inch the way we have it now. We did not see any gains with one over the other. The bottom line is that ALL the current downpipes are going to be 2.5inches at the flange. Please wait to have them first before you start saying that these are not high quality.
Vince, I didn't want to offend you at all. I am just being realistic that we are in the process of seeing a vendor battle between US made and Chinese made. I think you will agree that this is indeed a topic of discussion.
Appreciate 0
      09-10-2009, 10:42 AM   #15
cstavaru
Brigadier General
cstavaru's Avatar
97
Rep
3,237
Posts

Drives: 2009 335i M Sport Sedan 6MT
Join Date: Aug 2008
Location: Bucharest, Romania

iTrader: (0)

I don't think that some catless downpipes design can bring more horepower gains than another. These are some 30cm PIPES, not rockets. They all have the same shape, and even if some of them are larger at the beginning for a few centimeters, its useless because the exhaust has 2.5". Maybe its even worse because there can be gas turbulences when the diameter goes abruptly from 3" to 2.5" creating unneeded backpressure.

The thing I would be concerned about is quality. If there are no leaks and the downpipes fit well and don't resonate or touch the car's body, its all good.

And I also think that a set of downpipes should not cost an arm and a leg, because if you get a full stainless steel exhaust with $1800, the downpipes should cost no more than $200.

Too bad the stock downpipes only sell with catalytic converters, because I think that the best downpipes would be the stock ones with the catalytic converter removed.
Appreciate 0
      09-10-2009, 11:04 AM   #16
Vince@ V K Motorwerks
Lieutenant Colonel
Vince@ V K Motorwerks's Avatar
51
Rep
1,739
Posts

Drives: 01 Black 911 Turbo, 09 X5
Join Date: May 2007
Location: Bloomingdale, IL

iTrader: (0)

Quote:
Originally Posted by Former_Boosted_IS View Post
Vince, I didn't want to offend you at all. I am just being realistic that we are in the process of seeing a vendor battle between US made and Chinese made. I think you will agree that this is indeed a topic of discussion.
Im not offended. Just dont want people speculating thing. I am not the type to talk crap about another vendor. Im sure AR makes a good product as does other vendors.

The discussion of Chinese made vs American made to me personally is irrelavent. Quaility is not a factor of orgin but of the person/company doing the work. Just because something is made in America does not mean it will be of the best quaility. I have seen many products made in the US that have poor quaility. I am all for supporting the US economy, however, you cannot ignore the concept of globalization.

Even BMW has parts being manufactured in China, india,...ect.

We inspect all our products throughly and ensure that quality is at the highest standard. Im sure everyone will be surprised at the quaility and fitment. It took us so long because we continued to test the downpipes.
Appreciate 0
      09-10-2009, 11:05 AM   #17
kyleb350
Brigadier General
kyleb350's Avatar
United_States
52
Rep
4,204
Posts

Drives: F30 335i M-Sport
Join Date: Jun 2008
Location: LoMbard, IL

iTrader: (6)

Quote:
Originally Posted by cstavaru View Post

Too bad the stock downpipes only sell with catalytic converters, because I think that the best downpipes would be the stock ones with the catalytic converter removed.
That's what these are pretty much.
Appreciate 0
      09-10-2009, 11:10 AM   #18
335e92tx
Major
335e92tx's Avatar
62
Rep
1,302
Posts

Drives: 07-335e92 - monaco blue
Join Date: Mar 2008
Location: Texas

iTrader: (2)

I think EGT temps post scroll are much less than 1300. Probably 900 is a little more likely.
__________________
JBSPEED|MIRO-M6 reps|BMS JB3 V2.0 & DCI |VK Motorwerks DPs|BSH Oil Catch Can |Wavetrac |ETS IC
replacement FP #3 installed on 11/18 @43K - probably more sig updates to follow :/
Appreciate 0
      09-10-2009, 11:13 AM   #19
Vince@ V K Motorwerks
Lieutenant Colonel
Vince@ V K Motorwerks's Avatar
51
Rep
1,739
Posts

Drives: 01 Black 911 Turbo, 09 X5
Join Date: May 2007
Location: Bloomingdale, IL

iTrader: (0)

Quote:
Originally Posted by kyleb350 View Post
That's what these are pretty much.
Thats what they are. 5" of combined diameter is more than enough for these little snails.
Appreciate 0
      09-10-2009, 11:20 AM   #20
cu_north
Seasoned Lurker
1
Rep
160
Posts

Drives: 2007 E90 335i Black/Black
Join Date: Sep 2008
Location: AZ

iTrader: (0)

Regardless of how large a DP is or where its made I think we can all agree the profit margins on a piece of pipe are through the roof.

Vince is just willing to offer them at a much better price. I look forward to the group buy people giving us their thoughts.
Appreciate 0
      09-10-2009, 11:44 AM   #21
Vince@ V K Motorwerks
Lieutenant Colonel
Vince@ V K Motorwerks's Avatar
51
Rep
1,739
Posts

Drives: 01 Black 911 Turbo, 09 X5
Join Date: May 2007
Location: Bloomingdale, IL

iTrader: (0)

Im sure there will be plenty of reviews very soon !
Appreciate 0
      09-10-2009, 12:34 PM   #22
2008_335i_coupe
Lieutenant
2008_335i_coupe's Avatar
United_States
8
Rep
542
Posts

Drives: 2008 335i Coupe, Apline White
Join Date: May 2007
Location: austin, tx

iTrader: (7)

why be cheap?
get the AR design 3" catless downpipes.. they are awesome and fit perfect and wel worth the $600 price..

I got mine for $525 shipped on Ebay new..
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
Forum Jump


All times are GMT -5. The time now is 09:44 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
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