BMW F90 M5 Stainless Steel Valved Catback Exhaust

BMW F90 M5 Stainless Steel Valved Catback Exhaust

Give your BMW F90 M5 the exhaust note its 4.4 litre twin turbo V8 has always deserved with this Stainless Steel Valved Catback Exhaust System, engineered to free up exhaust flow and transform the character of the car without compromising everyday drivability.

The factory F90 exhaust is heavily silenced, and the S63 spends most of its life sounding far quieter than an M5 should. This system replaces the restrictive rear section with a free flowing design that lets the engine breathe, unlocking the deep V8 tone the standard car keeps hidden.

An independent Varex valve system, controlled by remote, puts you in charge of how loud the car is at any moment. Closed, it is calm enough for a cold start in a quiet street. Open, it delivers the full hard edged V8 bark under load.

Every section is manufactured from premium T304 stainless steel and precision TIG welded throughout, built to handle the heat of a twin turbo V8 while retaining factory mounting points for a clean, bolt on installation.

Whether your M5 is otherwise standard or running downpipes and a tune, this system delivers the sound and flow the platform is capable of while remaining completely usable every day.

Key Features

Independent Varex Valve System

Rather than reusing the restricted factory valves, this system operates its own dedicated valve assembly with complete travel in both directions. Sealed when closed for quiet running, and fully unobstructed when open for maximum flow and volume. Switch between a refined daily-driving experience and an aggressive performance exhaust note at the touch of a button.

Premium T304 Stainless Steel Construction

Corrosion resistant stainless steel throughout for long term durability under sustained high exhaust gas temperatures.

Improved Exhaust Flow

Removes the restriction of the heavily silenced factory rear section and allows the S63 to breathe far more freely.

Signature Twin Turbo V8 Tone

Delivers the deep, hard edged V8 character that the standard exhaust suppresses, with a noticeably stronger presence under load.

Precision TIG Welded

High quality welds engineered to withstand extreme temperatures and demanding performance use.

Mandrel Bent Tubing

Maintains a consistent internal diameter through every bend so flow is never choked.

Direct Bolt On Fitment

Designed specifically for the F90 M5 using the factory mounting locations and hanger positions.

Performance Benefits

• Increased exhaust flow efficiency
• Sharper throttle response
• Deeper and more aggressive V8 exhaust tone
• Reduced exhaust restriction
• Ideal supporting modification for downpipes and ECU tuning
• Full daily drivability retained through valve control

Performance gains may vary depending on ECU calibration and supporting modifications.

Sound Characteristics

Valves Closed

• Refined OEM+ exhaust note
• Minimal drone for comfortable daily driving
• Discreet enough for early starts and residential streets

Valves Open

• Deep, aggressive twin turbo V8 tone
• Substantially greater volume under acceleration
• Enhanced crackles and pops when tuned
• More pronounced cold starts
• Strong V8 character throughout the rev range

Vehicle Fitment

BMW F90 M5 (2018-2023)
BMW F90 M5 Competition (2018-2023)

4.4L S63 Twin Turbocharged V8 Engine

Please Note

Professional installation is strongly recommended.

Exhaust sound characteristics may vary depending on supporting modifications such as downpipes and ECU tuning.

Why Choose Proven Performance Parts

We specialise in high-performance parts for European vehicles — including Volkswagen GTI & R models, Audi S/RS platforms, and BMW M vehicles. Every product we offer is carefully selected for its quality, fitment, and real-world performance — tested by enthusiasts, for enthusiasts.