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TT.Customz
BMW M3/M4 G8X

Cat-Back Exhaust System
(Valvetronic)

★★★★★
Be the first to review
£2,299.00
From
Available to order
Fitment M3/M4 G8X
System Cat-Back
Control Valvetronic
Material — Titanium
Titanium
Stainless steel
Tip Style — Gunmetal
Titanium Colour — Blue
Your vehicle
Valve control — TT ValveTronic remote
On BMW both routes stay open. Our valve body takes the factory motor, so switching later is a motor swap, not a rebuild.
Hand-Built to Order
Up to four weeks from payment confirmation, with photo updates
Warranty Covered
Against manufacturing defects
Expert Fitment Check
Our team verifies your vehicle specs
Direct to Your Door
Delivered from manufacturer to you

After your order is placed, our technical team will personally contact you to confirm your vehicle details, specifications, and compatibility to ensure the product is manufactured perfectly for your vehicle. If any adjustments are required, we will verify everything with you before production begins.

Description
▾

BMW M3 / BMW M4 Valved Cat-Back Exhaust System

Specifically crafted for the BMW M3 and M4 G8X, this valved cat-back exhaust delivers an enhanced engine soundtrack and a commanding presence, while preserving flawless OEM-style fitment. Built from premium stainless steel, with an optional titanium upgrade, the system features a quad-exit design and fully integrated valvetronic control for complete sound adjustability. Multiple exhaust tip finishes are available to complement your vehicle’s style.

The kit includes all cat-back piping, high-quality clamps and fittings, valve actuators (where applicable), and a dedicated remote-control module for easy operation. Each system is hand-assembled with precision welding to ensure strength, durability, and a perfect fit on standard vehicles.

Production typically takes up to four weeks from payment confirmation, with next-day shipping once your system is complete.

With the adjustable valves, you can switch from a subtle, refined tone for everyday driving to a bold, open-valve M Power roar when you want to make a statement on the road.

As a bespoke, made-to-order product, returns and refunds are accepted only for confirmed manufacturing defects.

Specifications
▾
SystemCat-Back
ControlValvetronic (electronic valve)
Material OptionsTitanium / Stainless Steel
FinishPolished / Heat-blued titanium
ConnectionDirect OEM flange fit
Compatibility
▾

Vehicle Compatibility

BMW M3 (G80 / G81): 2021–present

BMW M4 (G82 / G83): 2021–present

Exact fitment is confirmed with you directly after order, before production begins.

Shipping & Returns
▾

Custom-built to order. Production takes up to four weeks from payment confirmation, and we send photo updates as your system is built. Shipped via DHL Express with full tracking to UK and EU.

Every system is checked before dispatch and covered by our warranty against manufacturing defects. If anything arrives damaged, faulty or incorrect, send us photos within 48 hours and we put it right with a repair or replacement.

Because each exhaust is built for your vehicle, we can't take it back for a change of mind once production has started. Full details in our returns policy.

Sport
Open Valve Mode
Refined
Closed Valve Mode
Custom
Hand-Built to Order
Warranty
✓ Covered
Engineering

Built to perform.
Designed to last.

Valvetronic Control
Electronic valve opens fully under sport mode for unrestricted exhaust note. Closes for everyday refinement.
Grade 5 Titanium
Aerospace-grade titanium — lighter, stronger, heat-resistant with a distinctive heat-blued finish.
Direct OEM Fitment
Precision flanges match factory mounting points exactly. No cutting, no adapters. Professional install under 2 hours.
Hand-Built to Order
Every system is manufactured specifically for your vehicle before shipping.
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Free delivery worldwide

We offer worldwide shipping on all custom builds. Every order is carefully packaged and dispatched with trusted couriers to ensure safe delivery, wherever you’re located.

Customer Satisfaction

All products are thoroughly quality-checked before dispatch. In the rare event of a manufacturing defect or damage on arrival, we’ll work quickly to resolve the issue in line with our returns policy.

Top-notch support

Our dedicated support team is on hand before and after purchase to assist with compatibility checks, order updates, and installation guidance ensuring a smooth experience from start to finish

Secure payments

All payments are processed through trusted, encrypted payment providers for complete peace of mind. Your details are protected at every step of checkout.