BMW G29 Z4 M40i Valved Sport Exhaust System

BMW G29 Z4 M40i Valved Sport Exhaust System

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$2,799.99
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BMW Z4 M40i Valved Exhaust System

3.5" Midpipe, Dual 3" Axle-Back, Vacuum Valves

Overview

The Valvetronic Designs Valved Exhaust System for the BMW G29 Z4 M40i is the ultimate upgrade for enthusiasts who demand both performance and versatility. Developed from our extensive R&D on B58-powered platforms—including the Supra and M340i—this system transforms the Z4’s sound and performance, unlocking the true potential of BMW’s celebrated inline-six.

Sound & Control

  • Valves Open: A rich, aggressive tone with crisp throttle response, pronounced turbo spool, and motorsport-inspired overrun.

  • Valves Closed: A refined, stock-like sound perfect for long cruises or early-morning starts—ideal when you want performance without the attention.

Performance Engineering

  • Maximum Flow Design: Single 3.5" midsection transitioning into dual 3" mandrel-bent runs for optimal exhaust scavenging and reduced backpressure.

  • Balanced Sound Profile: Tuned for a deep, full-bodied note inspired by our acclaimed B58 Supra and M340i systems.

  • Precision Construction: TIG-welded T304 stainless steel for exceptional durability and corrosion resistance.

Fitment

  • 2017+ BMW G29 Z4 M40i

Features

  • Fully mandrel-bent for maximum flow

  • Precision TIG welds for high strength

  • Built from T304 stainless steel

  • Electronic-actuated valves for rapid and reliable operation

  • 11.1 lbs lighter than the factory exhaust

  • Beautiful tips to complement the Z4’s styling

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BMW G29 Z4 M40i Valved Sport Exhaust System

$2,799.99

  • ACHIEVING

    4.8

    average rating

  • With

    95%

    positive reviews

  • LESS THAN

    3%

    return rate

Does it come with a warranty?

All parts are individually warrantied by the company who produces the part. Please look into each warranty terms and service.

What happens if I don't like it?

Customer satisfaction is our #1 priority so if you are unhappy with something in the build let us know and we can either recommend a part that will better suite your needs or look at more tuning options to meet your expectations.

How fast is shipping?

Shipping will depend on availability of parts. While we stock our most commonly sold parts we do not stock all parts. If a part is on back order or has a lead time we will communicate with you through the whole process so your are not left wondering why a part hasn't shipped yet.

What's the returns policy?

Once a part has been installed we can no longer take the part back.

Returns and Cancelations are subject to a restocking fee.

For our pre made builds sales are final so please contact prior to purchasing to make sure the build meets your expectations, its easier to adjust the build before the purchase rather than after.

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