Built by Boost & Tune Exhaust Downpipes – BMW F90 M5

Maximum Flow. Sharper Response. Unleash the S63 V8.

Upgrade the exhaust flow, sound and performance potential of your BMW F90 M5 with thIS Exhaust Downpipe System, available through Boost & Tune Bavarian..

Manufactured from T304 stainless steel, these direct-fit downpipes are designed to reduce exhaust restriction, improve turbo response and give the S63 4.4-litre twin-turbo V8 a deeper, more aggressive exhaust note. Precision TIG-welded construction provides the strength and heat resistance required for tuned and high-boost applications.

Catless Downpipes with SS304 Midpipe

A complete high-flow package combining:

• Catless downpipes

• Stainless-steel midpipe

• More aggressive exhaust character

• Improved flow from the turbo outlets through the centre exhaust section

Performance Benefits

• Reduced exhaust backpressure

• Improved turbocharger response

• Sharper throttle response

• Stronger exhaust flow at higher power levels

• Deeper and more aggressive V8 sound

• Increased turbo and induction sound

• Greater performance potential when paired with an appropriate ECU calibration

• Reversible installation, allowing the factory system to be refitted

Construction and Engineering

• Premium T304 stainless-steel construction

• Precision TIG-welded joints

• Engineered to withstand elevated exhaust temperatures

• Direct-fit design using factory connection points

• Optional thickened thermal insulation or heat shielding

• Available in multiple catalytic-converter configurations

• One-year limited manufacturer warranty against material and workmanship defects

Vehicle Fitment

• BMW F90 M5

• BMW F90 M5 Competition

• Model years: 2018–2023

• Engine: S63 4.4-litre twin-turbo V8

Professional installation is strongly recommended.

• Product and configuration advice

• Vehicle-fitment assistance

• Local purchasing support

• Professional workshop installation

• Custom ECU calibration

• Supporting exhaust and performance upgrades

Professional Installation and Tuning

Downpipe installation and custom tuning are available through the Boost & Tune Bavarian workshop.

For the best result, we can supply, install and calibrate the vehicle as a complete package—ensuring the selected downpipes work correctly with your engine tune, exhaust system and long-term performance goals.

Important: Exhaust and emissions requirements vary by location. Confirm the legality of your selected configuration before use on public roads. Catless systems are generally intended for competition or off-road applications.

Boost & Tune Bavarian
Performance Parts • Professional Installation • Custom Calibration

Supplier

Built by Boost & Tune

Product System

• Exhaust

Built by Boost & Tune Support

BBT can assist with fitment review, installation, supporting modifications, configuration and calibration requirements where applicable.