The BMW M5 F90 belongs to two worlds at once: as composed as your living room on the weekday commute, and capable of unleashing every bit of an M car’s fury the moment you touch the throttle. With its S63 twin-turbo V8 and M xDrive all-wheel drive, it’s already extraordinarily fast. So how do you draw out a character worthy of that power — with carbon, exhaust and intake?
🏁 What makes the F90 M5 special
At the heart of the F90 is the S63: a 4.4-litre twin-turbo V8. It’s an engine known for how well it takes to upgrades, and it hurls a large, luxurious sedan along like a genuine supercar. Add M xDrive — a clever all-wheel-drive system that can switch to pure rear-wheel drive when you want it — and the power finds traction in almost any condition.
Visually, the F90 leaves the factory with a carbon roof, so carbon fibre already belongs on this car. Its broad shoulders, muscular fenders and quad tailpipes make an ideal canvas for the right parts. At BYC we build our F90 M5 range from pre-preg carbon to OEM-fit precision — each piece sits on the factory mounting points without cutting.
🪶 Carbon: weight, aero and stance
The M5 is a big car, so carbon does double duty here — visual and functional. A front splitter and canards bring the nose closer to the ground and sharpen the car’s stance. Mirror caps and kidney-grille surrounds are the easiest fits and the fastest wins — and by matching the weave of the factory carbon roof, they tie the whole car together.
At the rear, a ducktail spoiler lifts the sedan’s bootline for a more athletic silhouette, while a carbon diffuser frames the bumper from below and reads as one unit with the quad exhaust. Side skirts stretch the profile and pin the car to the road. Small on their own, together these parts rewrite the M5’s proportions.
🔊 Exhaust: freeing the V8’s voice
The S63’s V8 character moves to another level with the right exhaust. The biggest gain comes from cutting the restriction ahead of the flow: a downpipe upgrade lowers back-pressure at the turbo outlet, lets the engine breathe more freely and unlocks that deep V8 tone. A cat-back system behind it completes the sound and the look.
The volume is your call: a valved system switches from early-morning quiet to circuit-bred roar at the touch of a button — priceless flexibility in a car this big. Titanium tips shed weight and bring that familiar burnt-blue patina. (Curious about the material difference? See our titanium vs. stainless steel comparison.)
🌬️ Intake: feeding the V8
A twin-turbo V8 responds best to clean, ordered air. A performance air intake kit gives the engine a less restricted path — and you feel it in throttle response and induction note. When you upgrade the intake on the S63 platform, swapping pressure-carrying plastic parts like the charge pipe for aluminium makes the whole system more durable and more consistent.
The logic is simple: improve the air going in, and you get the full return on the outlet you opened up with the downpipe and cat-back. Intake and exhaust work best when they complement each other.
🗺️ What order should you build in?
You can do it all at once; but for anyone building step by step, here’s a sensible route:
- Start with the visible wins: mirror caps, a front splitter and grille surrounds — the highest impact-to-cost ratio and your first proof of how carbon suits your M5.
- Open up the breathing: downpipe + cat-back and intake — this is where the V8’s character really changes. Plan the charge pipe alongside the intake.
- Finish the look: plan the ducktail spoiler, diffuser and side skirts together so the front and rear stay balanced.
The guiding principle here is cohesion: when every part shares the same weave, the same quality and the same OEM fit, the car looks “designed this way” rather than “added on later.”
🛒 The right part, the right fit
A good F90 build strengthens the M5’s dual character — quiet luxury and raw power — without overstating it. At BYC Performance we build our F90 M5 carbon, exhaust and intake range to OEM-fit precision — backed by a 12-month manufacturer warranty and free DDP shipping across Türkiye and worldwide (customs and duties are on us).
To choose the right parts for your car, browse the catalog, message us on WhatsApp for fitment and delivery, or see our builds on Instagram at @bycperformance.