2008 BMW 335i

This 335i centers around a single-minded upgrade: Pure Stage 1 turbos. It’s a straightforward power play that wakes up the N54 with faster spool, stronger midrange and a lot more confidence exiting corners. The rest of the car is left largely stock to keep it daily-friendly, so you get a blast of boost without turning every drive into a chore. Simple, effective and honest — the setup shows how a focused turbo upgrade can totally change the personality of an otherwise subtle sedan.