BMW’s move from the S85 V10 to the S63 twin-turbo V8 brought big gains in efficiency and speed—but the factory exhaust left the soundtrack behind. The Valvetronic Designs Valved Exhaust System restores the drama, delivering a sharper, more engaging tone with genuine GT composure when you want it.

Connecting to OEM or aftermarket free-flow downpipes, this system runs 3.0 inches from inlet to outlet and features a large X-pipe crossover for superior scavenging and response. Exhaust flow then passes through our valved mufflers, exiting via your choice of premium tips. A vacuum-actuated valve system with included controller ties into the factory harness for full, on-demand sound control.

Why It Works

• Large X-Pipe Crossover: Enhances scavenging for improved mid-range punch and a cleaner, more harmonized tone.

• 3.0" Mandrel-Bent Tubing: Reduces back pressure and sharpens throttle response.

• Vacuum-Operated Valves: Proven durability and rapid actuation for seamless sound transitions.

Sound & Control

• Valves Closed: Refined, near-OEM volume for daily driving and highway cruising.

• Valves Open: Deep, assertive V8 character with a motorsport edge.

• Controller Integration: Key fob control plugs into factory valve circuitry for reliable operation and complete control.

Construction & Options

• Materials: T304 stainless steel or ultra-light Grade 5 titanium.

• Weight Savings vs. OEM: –21.7 lb (Stainless) / –54.8 lb (Titanium).

• Craftsmanship: Precision TIG welds; smooth, high-flow routing.

• Tips: Multiple finishes available to complement your M5.

Installation Notes

• Direct bolt-on to OEM or aftermarket free-flow downpipes.

• 100% reversible—return to stock at any time.

What’s Included

• Valved cat-back exhaust system (Stainless or Titanium)

• Large-section X-pipe

• Vacuum valve hardware and key fob controller (factory integration)

• All required clamps and installation hardware

Specifications

• Tubing Diameter: 3.0" inlet to outlet

• Materials: T304 stainless steel or Grade 5 titanium

• Valves: Vacuum-actuated, controller included

• Weight Savings: –21.7 lb (Stainless) / –54.8 lb (Titanium) vs. OEM

• Finish: Brushed stainless or brushed/raw titanium

Located in Boyertown, Pennsylvania, our team is obsessed with sound. From our marketing department to all of our highly trained engineers and fabricators, we all have one goal of developing, manufacturing, and delivering the worlds greatest sounding exhaust systems. We were extremely fortunate to have tons of support from our fans and enthusiasts. We do what we do for the people. Cars are a way of life, an extension of ones’ beliefs and interests. Beyond the systems we make we want the world to remember us for bringing together people for the love of sound. Thank you so much for your support thus far in our journey. As electric cars become the norm, we will be around making sure sound stays as the staple for emotion.