BMW 5 F10 Turbo Oil & Coolant Lines

When it comes to turbo upgrades on the BMW F10, particularly the N55-equipped 535i, there's a solid aftermarket ecosystem to work with. The stock N55 turbo is a twin-scroll unit that responds well to software alone, but enthusiasts chasing serious power numbers typically look at upgraded turbos from MMP (Midwest Mounted Performance), Pure Turbos, or Vargas Turbo Technologies. The Pure Stage 2 N55 upgrade is one of the most popular bolt-on options, offering significantly improved spool and top-end flow while retaining the stock location, which keeps the install clean and manageable. For those running the N63 found in the 550i, the upgrade path is more involved given its hot-V twin-turbo configuration, with BMS and Burger Motorsports offering supporting hardware and tune solutions. Regardless of which direction you go, a proper tune from Wedge Performance, ESS, or similar is non-negotiable once hardware changes are made.

Before pulling the trigger on any turbo upgrade, get a fresh set of plugs, inspect your charge pipe for cracks - a known weak point on the F10 N55 - and ensure your fueling situation is dialed in. Running upgraded injectors or a port injection kit like the Aquamist system will save you headaches down the road as you push higher power levels.