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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > BMW 325i exhaust modification, cat back system



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      03-06-2011, 11:15 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?

Anyone done this and provide any tips/ recommendations?

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

Thank You!
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      03-28-2011, 01:57 PM   #2
ncohen
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ok so i am going to a powerflow dealer on wednesday to get my exhaust done

i want it so i can put the origional back on if needed be but i also want it to be sporty under normal driving but very loud when at high revs...

is this possible? if so how a it done? any pictures?

thanks!
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