🔊 MAD BMW M340i / M440i Cat-Back Exhaust System – Valved | Plug & Play | 304 Stainless Steel

Upgrade your driving experience with the MAD Cat-Back Exhaust System for the BMW M340i (G20) and M440i (G22). Designed with precision and performance in mind, this system delivers an aggressive yet refined exhaust note while maintaining the daily comfort BMW drivers expect.

🛠️ Plug & Play Performance – No Cutting Required

This cat-back system is a 100% bolt-on installation, requiring no cutting or permanent modifications. It reuses the OEM exhaust tips for a factory-finish look and allows you to return the vehicle to stock at any time—making it a completely reversible upgrade.

💨 High-Performance Build Quality

• Constructed from full TIG-welded 304 stainless steel for long-lasting durability

• Features larger diameter mandrel-bent piping to improve exhaust flow

• Delivers noticeable gains in sound and responsiveness

• Maintains perfect fitment and integrates seamlessly with OEM components

🔊 Tuned for the Perfect Balance of Aggression & Comfort

This system reuses the factory electronic valve actuator and adds a second valve/actuator on the opposite side. The dual-valve setup ensures:

• 💥 Maximum flow and sound under full throttle

• 🔇 Quieter, subdued tones during normal driving

Enjoy the best of both worlds—a deep, aggressive tone when you want it, and a calm, factory-like sound when you don't.

⚙️ Key Features:

• ✅ Full cat-back exhaust system – maximizes power and sound

• ✅ Uses OEM exhaust tips – perfect factory-style finish

• ✅ No cutting – completely plug-and-play

• ✅ Fully reversible install

• ✅ Built from 100% 304 stainless steel

• ✅ Mandrel-bent large-diameter piping for increased exhaust flow

• ✅ Dual valve system – retains OEM electronic valve control and adds additional actuator

• ✅ Includes all hardware and easy-to-follow installation instructions

📦 Fitment:

• 2019–2023 BMW M340i (G20)

• 2019–2023 BMW M440i (G22)

Compatible with both xDrive and rear-wheel drive models
Left-hand and right-hand drive compatible

🏁 Drive the Sound You Deserve

The MAD BMW M340i / M440i Cat-Back Exhaust System enhances your BMW’s character without compromising comfort or drivability. Whether you're carving mountain roads or cruising the city, this system delivers the power, tone, and craftsmanship discerning enthusiasts demand.

🛒 Order yours today and give your B58-powered BMW the exhaust note it was meant to have.