BMW E9X M3 Valved Exhaust System – V2

T304 Stainless Steel with Vacuum-Operated Valves & Optional X-Pipe

Overview

Version 2 of the Valvetronic Designs E9X M3 Valved Exhaust System delivers significant upgrades in both reliability and sound refinement, making it the benchmark choice for the platform. We’ve returned to vacuum-actuated valves—proven to be more durable and consistent than electronic alternatives—and enhanced the exhaust tuning for a purer, more engaging driving experience.

Constructed from premium brushed T304 stainless steel and fully mandrel-bent for maximum flow, this system offers the flexibility to cruise quietly with valves closed or unleash the raw S65 V8 soundtrack with valves open. For too long, premium valved systems have been out of reach for many enthusiasts—our mission has been to change that.

For even greater performance and sound, pair the valved rear section with our high-performance X-pipe mid-section, available in both free-flow and catted configurations.

Why It Works

• Vacuum-Actuated Valves: Increased reliability and rapid response for seamless sound control.

• High-Flow Mandrel-Bent Tubing: Improves throttle response and overall power delivery.

• Affordable Excellence: Premium valved performance without the excessive “M tax.”

Mid-Pipe Options

• Free-Flow X-Pipe: Aggressive tone and maximum horsepower gains; features a large X-merge after the transmission tunnel for optimal scavenging.

• Catted X-Pipe: Equipped with 200-cell Euro 6 catalytic converters for improved emissions compliance without sacrificing flow.

Resonator Layout:

• Four resonators in the front section smooth exhaust tones immediately from the engine.
  

Sound & Control

• Valves Closed: Factory-like refinement for urban driving or long-distance cruising.

• Valves Open: Aggressive, motorsport-inspired V8 tone with sharp throttle response.

• Flexible Setup: Choose rear section only or complete system with mid-pipe.

Construction & Quality

• Material: Brushed T304 stainless steel for strength and corrosion resistance.

• Weight Savings: 10.1 lb lighter than OEM.

• Craftsmanship: Precision TIG welds and smooth mandrel bends for durability and maximum flow.

• Tips: Premium finishes to complement the M3’s styling.

Fitment

• 2008–2011 BMW E90 M3

• 2008–2013 BMW E92 M3

• 2008–2013 BMW E93 M3

Installation Notes

• Direct bolt-on fitment to OEM mounting points.

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

What’s Included

• Valved rear section exhaust (vacuum-actuated)

• Optional: Free-flow or catted X-pipe mid-section

• All necessary hardware and clamps

Specifications

• Material: Brushed T304 stainless steel

• Valves: Vacuum-actuated

• Weight Savings: 10.1 lb vs. OEM

• Design: Large X-merge for scavenging efficiency; resonated for tonal balance