The BMW M5 basically invented the super-sedan. For decades it's been the benchmark car that can sit a family in comfort, but still embarrasses other supercars when you bury the throttle.
The F90 generation took that formula and added a 4.4L twin-turbo V8 and all-wheel drive, making it one of the fastest, and most usable performance cars ever built. It’s the kind of car that does everything, which is why owners love making theirs one of a kind.
If you’re reading this, you know that even on such a great car like the M5, stock just doesn’t quite cut it.
Maybe you want to sharpen the four-door with carbon and a meaner face.
Maybe you want that S63 V8 to sound as brutal as it drives.
Either way, the right mods can take the M5 from sleeper to a statement.
We’ve put together our best mods for the BMW M5 below, including both exterior styling and performance upgrades.
Upgrades Across Generations
The M5 has been an icon through every generation, and we support the whole family.
We stock parts for the:
Whether you're building the latest hybrid super-sedan or keeping a classic V10 M5 fresh, there are upgrades made for your exact chassis.
Exterior Styling Mods for the M5
The M5 has always played it subtle, and that's part of the appeal. But with a few well-chosen pieces, you can sharpen your car into something more aggressive while keeping that clean, executive look.
Kidney Grilles
Nothing changes the face of an M5 faster than a new set of kidney grilles. Our F90 kidney grilles swap the factory look for something with far more attitude, and they're one of the most popular first upgrades for the M5.
If you've got the LCI facelift, you can also choose between the dual slat and single slat styles to dial in the exact front-end look you want. It's the single biggest visual change you can make up front, and it instantly sharpens the whole face of the car, especially when it’s finished in gloss black against a lighter paint.
Carbon Fiber Mirror Caps
Carbon fiber mirror caps are the easiest way to add a motorsport touch to your M5.
They're lightweight, hold their gloss finish through weather and wash cycles, and tie in beautifully with other carbon pieces like a front lip or trunk spoiler.
They’re super quick to fit, and one of the best value-for-impact upgrades to your car, all for a fraction of the price of the factory carbon option.
Carbon Fiber Front Lip & Splitters
When you’re wanting real presence up front, carbon aero is the way to go. Our MT style 4-piece front lip drops the nose and adds an aggressive, planted stance, while the M Performance style front splitters give you that factory-optional carbon look.
Both are made from real dry carbon fiber, built to OEM fitment, and pair perfectly with carbon mirror caps to build out a full carbon front end.
It's the kind of upgrade that gives the M5 genuine road presence without ever looking loud or over the top.
Spoilers
One of the more popular items on an M5 is the rear spoiler. There’s a few options to choose from here, with some being subtle, like the M-style spoiler, and others having a more pronounced winged look, like the M4-style.
Either way, the added touch enhances the rear end and ties together the whole car, giving your M5 a new look.
Rear Diffuser
Upgrading your M5's diffuser will really transform the backend of your car.
They make your car look wider from the back, and tie the whole rear together, especially when paired with a new exhaust.
Often crafted from high quality carbon fiber, they hold up to the debris and weathering you might experience, and pair extremely well with other carbon fiber trim or upgrades.
Performance Mods for the M5
The M5 is extremely quick straight from the factory, but that twin-turbo V8 still has some huge headroom just waiting for you to tap into it. There's real sound and power left on the table and these are the upgrades that will help you feel and hear that every time you drive.
Valved Sport Exhaust System
A valved sport exhaust system is the upgrade that will completely transform your car. The S63 V8 has a serious sound, and our valved system finally lets it out properly.
With the valve system, you can keep the car civil for the daily commute, then open everything up when you want the full V8 to roar, all with the push of a button.
The freer-flowing design also helps improve exhaust flow and throttle response, fundamentally changing how engaged the car feels to drive.
Downpipes
Downpipes are where the real gains hide. Our F90 M5 downpipes replace the restrictive factory units, freeing up exhaust flow, sharpening turbo spool, and adding a more aggressive tone to your car.
Pair these with a valved exhaust, and the downpipes give you a deeper note, faster response, and a real bump in power delivery.
Just keep in mind that catless race pipes may affect emissions compliance, so check your local regulations before installing.
Intake, Charge Pipes & Tune
To round out the performance side, the F90 M5 responds strongly to bolt-ons like cold air intakes and upgraded charge pipes for better airflow and boost consistency.
Stack those with downpipes and an exhaust, then finish with an ECU tune, and the S63 comes alive in a way no single mod can match.
This platform is famous for making big, reliable power with the right combination of parts and it's genuinely one of the best-responding engines in the BMW lineup for bolt-on upgrades.
So, Which Mod Should You Start With?
The M5 is one of the most complete performance cars ever built straight from the factory, but the right mods turn it into something that's unmistakably yours.
If you want a fast, high-impact visual win, start with the kidney grilles or a spoiler. Both are easy to fit and make an immediate difference, giving that understated four-door a much sharper presence.
If you're chasing sound and performance, a valved exhaust paired with downpipes is the combination that transforms the drive - that's where the S63 V8 really comes alive, and it's the foundation every serious M5 build is based on.
From there, an intake and tune take it even further. The possibilities are as deep as your wallet!
At German Car Accessories, every part we stock is built for precise fitment, premium quality, and a difference you can actually see and hear, so you can build your M5 your way, with confidence.
