BMW M5 F90 EXHAUST DOWNPIPE 18-23

• High-flow T304 stainless steel or optional titanium construction
• Mandrel-bent tubing with precision TIG welds for optimal exhaust flow
• Dual open-air cone filters or sealed carbon fiber intake boxes
• Enhanced turbo spool response and improved throttle reaction
• Compatible with OEM and aftermarket exhaust systems
• Prepares engine for Stage 2+ ECU tuning

• 1 x Performance Downpipe (catless or high-flow catted)
• 1 x Dual Cold Air Intake System with filters
• Installation hardware and gaskets

• BMW M5 F90 (2018–2023)

• Bolt-on fitment; requires vehicle lift and basic hand tools for safe removal and installation.
• Professional fitting is recommended to ensure correct turbo inlet sealing and avoid any emission-related issues.
• ECU tuning is highly recommended, particularly with catless downpipes, to optimise performance and prevent fault codes.
• Allow 3–4 hours for professional installation; improper fitting may affect turbo response and engine performance.

Will this fit my BMW M5 F90?
Yes, this combo is designed specifically for the F90 M5 (2018–2023) with the S63 4.4L Twin-Turbo engine and ZF 8-speed automatic transmission.

Should I choose catless or catted downpipe?
Catless offers maximum flow and sound; however, it may trigger a check engine light without tuning and carries emission considerations. Catted versions balance performance with compliance. Contact Project Styling to discuss your priorities.

Do I need professional fitting?
Yes, professional installation is strongly recommended. Improper fitment can affect turbo sealing, engine performance, and emissions. Project Styling offers fitting services in Southend-on-Sea.

What performance gains can I expect?
You can achieve 30–60 hp gains (depending on tune, ECU map, and setup). Benefits include sharper turbo response, deeper exhaust tone, and improved throttle feel, especially when paired with Stage 2+ tuning.