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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 > catback and PROcede question



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      04-07-2010, 05:04 PM   #1
twinturbopg
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Lightbulb catback and PROcede question

hi guys I did a quick search and couldn't find anything on it....

I'm running V3 Rev1 and was planning on running cat back exhaust which I have been told it deletes the secondary cat you down pipe and your primary cat is stock.

My question is do I need an O2 sim for this or something? or change some particular settings in my maps? I'm running stage 1 11-2 6AT maps. Or do I just have to upgrade my chip to a Rev2 which I would like to hold off for now.

I also have DCI & Scoops.

If you do you where I can find this information please provide me a link thanks!
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      04-07-2010, 05:11 PM   #2
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if you have stock downpipes you'll be fine
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      04-07-2010, 05:12 PM   #3
twinturbopg
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Quote:
Originally Posted by jpsimon View Post
if you have stock downpipes you'll be fine
Yes I am planning on using my stock downpipes....oh yes thanks for the confirmation.
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      04-07-2010, 07:09 PM   #4
twinturbopg
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sweet even shot out an email to Vishnu support and they confirmed it as well...not need for O2 sims woohooo.
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      04-07-2010, 07:30 PM   #5
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oops, mods pls delete.
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