The N55 engine is a turbocharged straight-six engine that was featured in several BMW vehicles between 2009 and 2021. With over a decade in production, several N55 engines are still powering BMWs on the road today. And enthusiasts frequently seek out N55 turbo upgrades. You may be one of them! As you consider upgrading your N55 turbo, here are a few things to keep in mind.

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