When it comes to enhancing the performance and sound of your BMW 335i with the N54 or N55 engine, upgrading the exhaust system is the first thing you should do. A proper catback exhaust can…
As you begin to modify your BMW 135i, 335i or 535i, a metal charge pipe should be one of your first upgrades. The stock plastic charge pipe is prone to cracking or exploding when tuned.…