Milltek Cat Back Exhaust - Mercedes G63 W463 4.0 Bi-Turbo V8 OPF

The delivery time for products in stock is 1-3 business days.

If the product is not in stock and it is a pre order product, the average delivery time is 5-21 business days. If the product has a longer delivery time than previously announced, we will be in touch.

Terms for product returns:

• You must return the ordered products within 14 days of receiving
• The products must be unused and without damages
• Commission fee for handling returns is 21,90€
• For product returns, the customer is in charge of the return costs. Only door to door service (Express)
• Shipping costs are not refunded

For international orders (outside of Europe) sales are final and non-refundable. Once an order is placed, it cannot be canceled or returned. By placing an order, you acknowledge and agree to these terms.

Return address: QT Parts, Vasarakatu 8B, 37150 Nokia, Finland.

Pre order / made-to-order products

If the product you have ordered is a pre order or made-to-order item, it is not subject to the 14-day right of withdrawal or return under consumer protection laws, as the product is manufactured or sourced specifically based on the customer’s individual order.

If you wish to cancel your order before receiving the product, we will refund 50% of the total order amount.

This condition applies to the following product categories:

• Suspension
• Engine Tuning
• Engine Parts
• Exhaust Systems
• Fueling
• Turbochargers/superchargers
• Drivetrain
• ECE-approved Downpipes

All of the above products are manufactured or sourced individually based on the customer’s order, and therefore cannot be returned after delivery, unless the product has a manufacturing or material defect.

In the event of such a defect, the standard liability for defects as provided by consumer protection legislation shall apply.

The Milltek Sport Cat Back Exhaust System is designed for Mercedes-AMG G63 (W463) models with a 4.0-litre V8 Bi-Turbo engine and factory-fitted OPF/GPF particulate filter (UK/European market vehicles). This system replaces the section of the exhaust system after the catalytic converter and provides a distinctly sportier sound and improved exhaust flow while maintaining the car's original drivability and comfort.

The Cat Back solution is an excellent upgrade for the driver who wants to unleash the character of the G63's V8 engine in a controlled manner without compromising usability.

The powerful yet controlled sound of the AMG V8

Milltek has tuned this exhaust system to accentuate the G63's iconic V8 sound:

• Deeper and fuller sound at idle

• Sporty sound as the load increases

• No annoying resonance or drone when driving on the road

The sound profile is clearly sportier than the original system, but maintains the premium driving comfort of the G-Class even on longer journeys.

Improved flow and ride feel

Milltek Cat Back Exhaust System:

• reduces exhaust back pressure

• improves the feel of the engine's throttle response

• enhances exhaust gas flow throughout the entire rev range

• supports efficient utilization of the engine's torque and power range

The freer-flowing design is ideally suited to the characteristics of AMG's V8 Bi-Turbo engine.

Direct bolt-on installation

The exhaust system is designed:

• to fit directly into the original mounting points of the Mercedes-AMG G63 (W463) model

• for installation without welding or permanent structural changes

• to preserve the car's original systems and structures

OEM-level fit ensures a clean and unobtrusive finish.

304L Aircraft Grade Stainless Steel

The entire system is made of high-quality 304L grade stainless steel , which offers:

• excellent corrosion and heat resistance

• long service life even in demanding use

• flow-optimized internal structure

• carefully finished TIG welds

The material and workmanship meet Milltek's premium quality standards.

Fit

• Mercedes-AMG G-Class G63 (W463)

Engine: 4.0 V8 Bi-Turbo
For UK/European OPF/GPF equipped cars only
Model years 2019–2025