Best BMW M340i Mods | Exhaust, Carbon Upgrades & Interior Enhancements
Updated: July 2025
By RMD Performance
The BMW G20 M340i is an ideal balance of daily comfort and B58-powered performance. But if you want to unlock its full potential—visually and mechanically—you’ll want to upgrade a few key areas.
At RMD Performance, we stock and test-fit the most effective bolt-on mods for the M340i platform. From exhaust tone to carbon trim, here are the parts that elevate your build from factory to fully personalized.
Performance Exhaust System
A new tone. A new response. A new feel.
The factory exhaust is quiet. Controlled. Forgettable.
Our G20/M340i Performance Sport Exhaust System replaces it with something closer to what the B58 engine was meant to sound like. No drone. No guesswork. Just sharp response and a deeper, refined tone that opens up under throttle.
Bolt-on. Zero cutting. Pure function.
This is how the G20 should have sounded from day one.
Carbon Fiber Exterior
Carbon isn’t about flash. It’s about focus.
Every carbon part we carry for the G20 is built with purpose. Lightweight, form-fitting, and true to OEM lines—these pieces don’t just look better. They reduce visual clutter and sharpen the car’s stance.
Available upgrades include:
Installation is clean and reversible. The result isn’t a show car—it’s a cleaner, more resolved version of the car you already love.
Interior Enhancements
The interior is where the connection is made. Steering feel. Shifter response. What you see and touch every day matters more than most people admit.
We offer several carbon interior upgrades built to elevate that connection without disrupting the factory design language:
Each piece is lightweight, durable, and designed to age well with the car.
Practical Accessories
Good design solves problems. These pieces do just that—without compromising form.
They’re simple. Useful. Functional upgrades made for owners who pay attention to the details.
Refine the form. Unlock the performance. Make it yours.
Explore all BMW G20 3-Series upgrades at RMD Performance.