WSTN BMW M3/M4 Valved Catback Exhaust System (G80/G82/G83)

Want your M3 or M4 to sound as good as it looks?

The WSTN Valved Exhaust System transforms your S58-powered M car—sharper throttle response, lighter weight, and instant control over your exhaust tone with the push of a button. Built from true stainless steel, this system delivers raw performance and refinement in one package made to handle everything from daily drives to full-throttle runs.

Why Upgrade?

✅ Switch between muffled and straight piped, refined and aggressive tone using the electronic valve control system (remote included)

✅ Made in the same factory as the other Big Brands

✅ Gain throttle response and deeper tone with 3.5” mandrel-bent piping and reduced backpressure

✅ Drop 11 kg from the factory system for improved handling and sound

✅ Dual-walled black chrome tips for a motorsport-inspired finish

✅ Constructed from stainless steel—resists corrosion, heat, and cracking

✅ Direct bolt-on fit—no cutting or welding required

✅ 1-Year No BS Warranty

Fitment & Compatibility

✔️ BMW G80 M3 Sedan (2020 +)

✔️ BMW G82 M4 Coupe (2020 +)

✔️ BMW G83 M4 Convertible (2020 +)

✔️ Designed for S58 twin-turbo engines

In the Box

• 1 × WSTN Performance Valved Exhaust System

• 1 × Remote Control Unit (for valve operation)

• 1 × Full Fitting Kit (Gaskets, Clamps, Bolts)

Installation

🛠️ Fitment: Direct OEM-style bolt-on—mounts cleanly to factory points

⏱️ Install Time: ~2 hours (professional installation recommended)

📦 Includes: Everything required for DIY setup

Why WSTN Performance?

✅ True Stainless Steel - Never mild steel or coated alternatives

✅ Engineered Fitment - Each system is model-specific and CNC-formed for precision

✅ Performance You Can Feel - Lighter, stronger, and tuned for balanced volume

Bring Your M Car to Life

Refined when you need it. Brutal when you want it.

Enjoy the convenience of worldwide shipping on all products.

If upon receiving your product you wish to return it, we offer a 30-day returns policy.

All items must be in new or resalable condition to be eligible for return.

For our in-depth returns information please follow the link below.

"WSTN Performance Shipping And Returns" 

SHIPPING INFORMATION

- We deliver Worldwide

- Most of our products are sent via express methods worldwide (FeDex, DHL, Express Post etc.)

- Full tracking free with every order.

Read more here.

Please note that WSTN Performance recommends installation by trained professionals

We highly recommend having all our products installed by a trained professional who possesses the necessary expertise and utilises the correct tools.

By entrusting the installation to an experienced professional, you can ensure optimal performance and minimise the risk of any potential damage.

WSTN Performance is not liable for any damages caused when installing our products or for potential damages

Your satisfaction and the safety of your vehicle are our top priorities.