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      08-10-2012, 06:19 PM   #1
Twhill19
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Downpipes

Want to upgrade my down pipe and exhaust on my 2012 135i N55...lots of companies out there to choose from

Anyone have good recommendations?

Thinking about AR, aFe, CP-E, and Active Autowerkes (all cat-less)
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      08-10-2012, 07:00 PM   #2
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If you don't mind spending a little extra for quality then go with Berk for the down pipe + exhaust. If your on a budget then do BMS downpipe + berk exhaust.
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      08-12-2012, 07:19 PM   #3
Twhill19
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dont mind spending a lot...just want the best!

Thanks for the recommendation, have any sound clips?
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      08-12-2012, 09:28 PM   #4
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I have a Vishnu 3.5 catted and really like it. No smell and great decrease in spool time
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      08-12-2012, 09:39 PM   #5
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What do you guys use for O2 error codes?
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      08-12-2012, 10:14 PM   #6
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Quote:
Originally Posted by Weasel410 View Post
What do you guys use for O2 error codes?
Most piggyback tunes have an auto delete feature which keeps the DME from throwing a CEL. At this time I don't know of any DP fix for the N55.
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      08-12-2012, 10:31 PM   #7
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Quote:
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I have a Vishnu 3.5 catted and really like it. No smell and great decrease in spool time
Does your car throw cel codes from the catted dps.
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      08-12-2012, 10:35 PM   #8
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I have been extremely happy with my AR catless downpipes
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      08-13-2012, 05:15 PM   #9
ParkNuts
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Does your car throw cel codes from the catted dps.
YES it does. I picted up a Can Tool to auto-delete the code. I'm almost thinking about picking up a used catless DP and just going through a brutal uninstall/install every year for emissions (Texas). My shop charges me a lot for a downpipe install. Anyone do an N55 downpipe without too much headache? I'm an amateur mechanic but pretty handy.
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      08-14-2012, 02:35 PM   #10
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I thought you will not have code with catted DP?
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      08-14-2012, 11:41 PM   #11
Twhill19
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Anyone run catless dp's with a BMW performance exhaust on an N55? I don't want to install software and am worried about CEL lights...

o2 solutions?

I have a BMW chip installed and would love to go catless without rewriting everything
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      08-15-2012, 04:43 AM   #12
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is it in agreement that Berk/AR make the best DP's?
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      08-15-2012, 05:14 AM   #13
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ok, ok...last one for now, promise.

Anyone have luck with a hi-flo CATTED DP that DID NOT throw a CEL?
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      02-06-2013, 03:18 PM   #14
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Sorry for the thread revival but are Agency Power downpipes any good?
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      02-06-2013, 03:31 PM   #15
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Quote:
Originally Posted by Weasel410 View Post
What do you guys use for O2 error codes?
Check out Cp-e.com; they have a DP cat delete fix. I have purchased it but haven't installed it yet...
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      02-06-2013, 03:35 PM   #16
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Check out Cp-e.com; they have a DP cat delete fix. I have purchased it but haven't installed it yet...
Where is this nonsense you speak of? I see a DP but I dont see a CEL fix.
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      02-06-2013, 03:38 PM   #17
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http://www.cp-e.com/products/bmw-135...-xcat%E2%84%A2

Read sir!.... ;-P
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      02-06-2013, 03:40 PM   #18
Sequence
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This is a N55 thread, not N54. That wont work on our vehicles

"Not compatible with 2011+ N55 twin power turbo motor."
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      02-06-2013, 03:45 PM   #19
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HAHAHA Oh crap, didn't notice that... Sucks to be you guys. Sorry! ;-P GL
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      02-06-2013, 07:32 PM   #20
Twhill19
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you bastard! haha
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      02-06-2013, 09:47 PM   #21
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Get BMS DP's & a JB4. Lots of power & a built in DP fix to eliminate the cat codes. For a less expensive solution BMS DP's & the add-on BMS DP only FIX
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      02-07-2013, 02:35 AM   #22
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Get BMS DP's & a JB4. Lots of power & a built in DP fix to eliminate the cat codes. For a less expensive solution BMS DP's & the add-on BMS DP only FIX
N54 solutions only unfortunately...N55 is SOL
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