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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Macht Schnell or AR downpipes?



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      12-01-2009, 02:34 AM   #45
chiefsotos
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I have installed Ar catless dps and the fitment was better than stock one!
The distance between the dps is more than 2cm accross the length of the pipes. Only for 5cm length the distance is about 1+cm, but still is much better than with stocks one.
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      12-01-2009, 02:39 AM   #46
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sorry off topic but how much time do ar downpipes take to put on? and how much average does a shop charge to put on??
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      12-01-2009, 02:48 AM   #47
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Quote:
Originally Posted by Mr. 5 View Post
I would be very much surprised if there was any difference in gains between the 2 pipes.
I've seen the 2 side by side and they are extremely similar.
But, there is definitely a difference between the 2.5" and the 3"
http://www.e90post.com/forums/showth...6974&highlight
So if the 3" downpipes mare about 15HP more. How much HP do the 2.5" UR downpipes make over the stock factory units?
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      12-01-2009, 06:42 AM   #48
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That's what I would like to know
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      12-01-2009, 06:47 AM   #49
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Quote:
Originally Posted by bmwowner619 View Post
sorry off topic but how much time do ar downpipes take to put on? and how much average does a shop charge to put on??
the usual install is between 2-3 hours, sometimes less sometimes a little more, depends on the condition of the exhaust to dp bolts, sometimes they are so rusted they need to be cut off.
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      12-01-2009, 08:07 AM   #50
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Quote:
Originally Posted by sexye92 View Post
the usual install is between 2-3 hours, sometimes less sometimes a little more, depends on the condition of the exhaust to dp bolts, sometimes they are so rusted they need to be cut off.
No cut off. Just use some antirust spray and leave it 5 minutes. If they still don't unscrew you must heat them with oxygen and then it is peace of cake!
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      12-01-2009, 08:16 AM   #51
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Quote:
Originally Posted by chiefsotos View Post
No cut off. Just use some antirust spray and leave it 5 minutes. If they still don't unscrew you must heat them with oxygen and then it is peace of cake!
after about 30-40k miles there isnt even threads left in some cases, its basically welded together. if your lucky they snap. not to mention the acutal nut edges that the socket contacs rusts away and you cant get anything on there to loosen them if you did heat them up.
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      12-01-2009, 08:43 AM   #52
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Quote:
Originally Posted by sexye92 View Post
after about 30-40k miles there isnt even threads left in some cases, its basically welded together. if your lucky they snap. not to mention the acutal nut edges that the socket contacs rusts away and you cant get anything on there to loosen them if you did heat them up.


This is true... exhaust bolts like to fuse up and if they don't snap, cutting them off is the way to go. That "anti-rust" spray will only help if u just need that little extra help. Once they are too far rusted, it won't do anything.
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      12-01-2009, 09:12 AM   #53
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They are basically the exact same, comparing AR to MS DP's... so doing a dyno blowout would be fun but pointless. Buy the pipes that offer the lowest price unless you can show me a difference between the 2 to justify one over the other. Also go with the one that offers better service. If 1 vendor is a DB (not defensive back!) then I personally would avoid that company. For me personally there wouldn't even be a choice between those 2 because 1 vendor won't get my business, ever.

Get coated too, it isn't much more and most definitely worth it while the pipes are still new and off the car. All we ever talk about is heat (upgraded FMIC's, catless DP's to reduce turbo stress/heat, wrapping pipes, CAI's, and of course the new flavor of meth...) so coated DP's will help keep some of that heat out of our engine bay as well. Supposed to help with exiting the hot air faster too or something. If coated isn't offered by the vender there is always Jet-Hot
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      12-01-2009, 09:45 AM   #54
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Quote:
Originally Posted by hotrod182 View Post
So if the 3" downpipes mare about 15HP more. How much HP do the 2.5" UR downpipes make over the stock factory units?
Why don't you do the same test that I did since you still have the OEM DPs?
Then you would be able to find out.
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      12-01-2009, 10:08 AM   #55
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Quote:
Originally Posted by ar design View Post
We might consider doing something like giving away 3 free sets of catless downpipes to people who make a minimum donation to a charity like St. Judes. We did a charity drive last year, and have been thinking about doing it again this year.

What do you guys think? Tax deductions, anyone?
my brother has been on the board of directors at st. jude for many years... st. jude is a great cause.....let me know if and when you do a charity drive.

i have RR catless dps and would love to get a set of ceramic coated AR dps for an upgrade.
if i can do that and make a st jude donation... kindly let me know.
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      12-01-2009, 12:58 PM   #56
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MS seem like really nice quality.
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      12-01-2009, 06:11 PM   #57
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Thanks for all the input guys.hopefully the wife cracks and gets me the DPs for christmas.
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      12-01-2009, 08:31 PM   #58
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I have the MS's and they are amazing quality, perfect fitment and a good power increase I would definatly recommend them. Then again you can't go wrong with AR either both are awesome you will be happy either way. I would personally go with which one you could get the fastest.
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      12-01-2009, 10:01 PM   #59
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Just picked up my AR dp's today (they look top notch!!!) the only problem is I'm planning on installing them this summer !!!
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      12-02-2009, 12:59 AM   #60
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Quote:
Originally Posted by Nikos335i View Post
Just picked up my AR dp's today (they look top notch!!!) the only problem is I'm planning on installing them this summer !!!
get them in now! just got mine in a few hours ago and its insane...i was laying in my driveway out in the 40 degree weather at night time to get these babys in.totally worth it..ar dps ftw
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      12-02-2009, 01:00 AM   #61
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lovin my ar's...i dont want to stop speeding now that i got them in
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      12-02-2009, 01:33 AM   #62
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How complicated is it to install? Just thinking in advance for service time
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      12-02-2009, 07:10 AM   #63
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Originally Posted by DR_E92 View Post
How complicated is it to install? Just thinking in advance for service time
it depends on your mechanical skills, normal time for the average do it yourselfer is between 3-4 hours, but then you hear about guys that worked on it for a day or two only to have it towed to have the install completed. either way if your interested i am in central jersey and do installs especially dp's so if you decide you dont want to tackle it yourself send me a pm.
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      12-02-2009, 07:17 AM   #64
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Wow thanks. Yea I'm def a novice so I'll be pming you. Thanks
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      12-02-2009, 07:50 AM   #65
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Wow thanks. Yea I'm def a novice so I'll be pming you. Thanks
no problem, now to make the decision on which to buy and then talk the wife into it lol. i remember those days.
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      12-02-2009, 07:58 AM   #66
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Check. Check. I'm not wasting any time lol

She agreed last night so I will be going with AR coated DPs
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