BMW F-Chassis Valved Axle-Back Exhaust System – Version 2

T304 Stainless Steel with Electronic Valves & Cast Y-Pipe W/ 1x1 Carbon Fiber (3.5" Outlet)

Overview

The Version 2 Valvetronic Designs F-Chassis Valved Exhaust is our most refined system yet for the BMW F-Series lineup. Designed for maximum performance, versatility, and longevity, V2 introduces a host of improvements, including a new valve design for optimal reliability, relocated hangers, and revised muffler internals for a more docile, refined tone when valves are closed.

A newly engineered cast Y-pipe maximizes exhaust flow and enhances tonal quality, delivering a more engaging and sonorous sound across the rev range. Whether paired with the OEM mid-pipe or most aftermarket mid-pipes matching factory dimensions, this system offers seamless fitment and an uncompromising sound experience.

Why It Works

• New Valve Design: Improved durability and responsiveness over previous versions.

• Refined Closed-Valve Acoustics: Reduced volume and smoother tone for daily driving comfort.

• Cast Y-Pipe Upgrade: Increases flow and improves exhaust scavenging for a richer, more balanced tone.

Sound & Control

• Valves Open: Deep, raw, and aggressive tone with loud pops, sharp overrun snaps, and pronounced gear-change sounds.

• Valves Closed: Near-stock volume for quiet commuting or late-night driving.

• Dynamic Drive Mode Integration: Fully compatible with BMW’s factory drive mode settings for instant sound control.
  
  

  Construction & Quality

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

  • Craftsmanship: Precision TIG welds and full mandrel bends for optimal flow.

  • Tips: Sleeve-style exhaust tips for perfect alignment and premium appearance.

  • Valve System: OEM-style electronic valves with rapid open/close function; extension harness included.

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  Fitment (Includes xDrive models)

  F30:

  • 320i (2012–2016)

  • 328i (2012–2016)

  • 330i (2016–2018)

  • 335i (2012–2016)

  • 340i (2016–2018)

  F32 / F33 / F36:

  • 420i (2012–2017)

  • 428i (2012–2017)

  • 430i (2017–2019)

  • 435i (2012–2017)

  • 440i (2017–2019)

  F22:

  • 228i (2014–2016)

  • 230i (2016–2019)

  • M235i (2014–2016)

  • M240i (2017–2019)

  F20:

• M135i (2014–2017)

  M140i (2017–2019)
  
  

  Installation Notes

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

  • For non-m sport or 4 cyl applications, an m-sport style diffuser is necessary for dual tip fitment 

  • B58/B46 Owners: Requires minor mid-pipe modification 

  • 4-Cylinder Owners: Includes adapter pipe (weld recommended). Requires 6-cylinder diffuser or diffuser modification for proper tip exit.

  • Non-Valve Cars: Use our Electronic Exhaust Valve Harness to enable in-car valve control.