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

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