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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 > BMW 325i exhaust modification, cat back system



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      03-06-2011, 10:06 AM   #1
ncohen
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BMW 325i exhaust modification, cat back system

Hi all,

I have a 2008 BMW 325i (3L) and i want to change the exhasut. It's currently pretty much silent.

Options i have found are companies willing to change the exhaust from the car and tune it to my choice.

Question is, will this cause any error codes to come up? e.g. now the exhaust will be more free flowing could cause an error?

Am i likely to notice less mpgs from the same driving style?

and fiunally, can anyone reccommend somewhere in the UK (London area) who will do a good job of this?

Thank You!
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      03-06-2011, 10:13 AM   #2
stratplaya06
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As long as the O2 monitored cats way up front stay, you will not have any codes.

If you have the same driving style, you will not lose any mpg.

Post in the UK regional forum to find out someone local, and in the N/A modification section to find a recommended model of exhaust. This is the Turbo modification section.

Good luck bro, and enjoy your new exhaust
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      03-06-2011, 10:13 AM   #3
ncohen
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oops wrong section...can a mod close please and i'll put it in the correct one

thanks
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      03-06-2011, 10:14 AM   #4
ncohen
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Quote:
Originally Posted by stratplaya06 View Post
As long as the O2 monitored cats way up front stay, you will not have any codes.

If you have the same driving style, you will not lose any mpg.

Post in the UK regional forum to find out someone local, and in the N/A modification section to find a recommended model of exhaust. This is the Turbo modification section.

Good luck bro, and enjoy your new exhaust
thanks for that. will do it now!

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