Velocity Exhausts BMW F30 / G20 340i Exhaust System

BMW F30 340i / G20 M340i Catback Exhaust System

Built for the B58 turbocharged 3.0L inline-six, this catback exhaust system is engineered to unlock the sound the factory setup holds back. The B58 is one of the strongest engines BMW has produced, and this system removes the restriction, delivering a deeper, sharper, more aggressive soundtrack with improved throttle response.

Fitment

• BMW F30 340i & G20 M340i
• Direct bolt-on catback system with no cutting or permanent modifications required
• Precision-engineered for OEM mounting points and factory alignment
• Compatible with factory valve control system and drive modes (valved configurations)

Configuration Options

Build your system to match your goals. Choose your pipe configuration, add-ons, material, and tip finish at checkout.

• System: Sport Catback or Race Catback
• Add-On: System only, Downpipes, or 200 Cell Downpipes
• Valve Option: Valved (Sport Catback) or non-valved (Race Catback)
• Material: Brushed T304 Stainless Steel or Grade 5 Titanium
• Tip Finish: Carbon Fiber, Black, Brushed, or Burnt

Sound Character

The B58 has far more voice than the factory system lets through. This system lets it out.

• Sport Catback (Valved): A refined setup that stays comfortable and quiet when you want it, then opens up into a deep, aggressive note when you want it loud.
• Race Catback (Non-Valved): The loudest and most unfiltered option, with a raw, track-inspired tone and no restriction.
• Overrun Character: Aggressive pops, crackles, and turbo burble on deceleration and downshifts, most pronounced with the Downpipes upgrades.
• Overall Profile: Deep and mechanical at idle, opening into a sharp, forceful pull through the rev range.

Materials & Engineering

• Available in Brushed T304 stainless steel or aerospace-grade Grade 5 titanium for maximum strength-to-weight ratio
• Titanium configuration offers significant weight reduction vs. OEM exhaust system
• Downpipe and 200 Cell Downpipe options for reduced backpressure and increased turbo efficiency
• Precision TIG-welded for structural integrity and a clean, motorsport-grade finish
• Mandrel-bent tubing ensures optimal exhaust velocity and minimal restriction
• Designed to reduce backpressure and improve turbo spool
• High heat resistance for sustained performance under extreme driving conditions

Performance Benefits

• Improved exhaust flow for enhanced horsepower and throttle response
• Reduced system weight for sharper handling and acceleration (titanium configuration)
• Faster turbo spool and improved mid-to-high RPM responsiveness
• Enhanced driver engagement through sharper sound and feedback

What's in the Box

• Full catback exhaust system, built to your selected configuration
• All required clamps, hardware, and gaskets
• Plug-and-play valve integration components (valved configurations)
• Installation guide

Why This System

The 340i and M340i pair a world-class inline-six with a muted factory exhaust. This system removes that ceiling, delivering a more aggressive, more responsive, and more engaging driving experience.

For owners who want their 340i to sound as serious as it drives, this is the upgrade that defines it.