The MAD F90 M5 catback is a full system built to unlock the sound and performance the M5 always deserved. Premium materials, smart valving and serious flow gains make it one of the most complete upgrades you can bolt to the car.

Sound & performance

• Valved design that mirrors the factory setup — open the valves for a spirited, aggressive note, close them for a calm, comfortable cruise.
• Deep, resonant tone that really comes alive at higher RPM.
• Improved exhaust flow for gains of up to 15 whp, with smooth bends that keep things drone-free.

Build

• 304 stainless steel construction for durability and corrosion resistance.
• 4-inch oval tips (108mm x 102mm) in your choice of brushed, black, or carbon fiber.
• Works with the OEM valves and bolts up to factory mounting points for a precise, hassle-free fit.

Warranty & shipping

• Lifetime warranty against defects and fitment issues.
• 90-day return window.
• Orders ship in 1–2 business days.

Fitment

2017+ BMW F90 M5.

From KORE SPEED — proudly Canadian-owned. Email support@korespeed.com for fitment support.