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

T304 Stainless Steel with Electronic Valves & Cast Y-Pipe

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.

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 – Learn More

• 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.

What’s Included

• T304 stainless steel valved axle-back exhaust

• Cast Y-pipe assembly

• OEM-style electronic valves

• Extension harness for factory valve integration

• Sleeve-style exhaust tips

• All necessary clamps and hardware

Specifications

• Material: Brushed T304 stainless steel

• Valves: OEM-style electronic, integrated with BMW drive modes

• Design: Cast Y-pipe with revised muffler internals for tonal refinement

• Finish: Brushed stainless

🎧 Hear It in Action:

• Sound Clip 1

• Sound Clip 2