BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Have power pack opinion to jb4

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      01-28-2013, 01:04 AM   #1
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Hey guys just bought a 2010 335i and it came with the bmw power pack. Now I know it's a moderate stock tune but my question is if I go jb4 will I notice a big difference since I already have the power pack tune. Also is it a pain to take off when you go in to the dealer for service? Thanks.
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      01-28-2013, 12:48 PM   #2
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You will notice a difference with a jb4. Are you sure you have an N55?

Some people think removal of a tune is a breeze and some make it out to be the end of the world.

A proficient person can remove it in about 20 minutes.
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      01-28-2013, 01:14 PM   #3

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You should have an N54. I'd look at Cobb if you want ease of install/uninstall.
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