Milltek Rear Silencer - Mercedes C63S Coupe 4.0 Bi-Turbo V8 OPF 2019-2024

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 Rear Silencer(s) are designed for Mercedes-AMG C63 S Coupe models with a 4.0-liter V8 Bi-Turbo engine and factory-fitted GPF/OPF particulate filter . This solution replaces the rear silencers of the exhaust system and provides a sportier sound while keeping the original exhaust system in place.

The Rear Silencer(s) upgrade is an excellent choice for the driver who wants to improve the sound in a controlled manner without making extensive changes to the entire exhaust system.

The controlled and rich sound of the AMG V8

Milltek has tuned this system to highlight the character of the C63 S's V8 engine:

• 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 standard, but maintains the car's premium comfort in daily driving.

Improved flow and ride feel

Milltek Rear Silencer(s) exhaust system:

• reduces exhaust back pressure at the rear

• improves the feel of the engine's throttle response

• supports a smoother exhaust flow

• preserves the functionality of the original OPF/GPF system

The update complements the car's performance without compromising usability.

Direct bolt-on installation

The exhaust system is designed:

• to fit directly into the original mounting points of the Mercedes-AMG C63 S Coupe

• for installation without welding or permanent structural changes

• to preserve the car's original systems and functions

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 driving

• flow-optimized internal structure

• carefully finished TIG welds

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

Fit

• Mercedes-AMG C63 S Coupe 4.0 V8 Bi-Turbo

Engine: 4.0 V8 Bi-Turbo
Only for GPF/OPF equipped models
Model years 2019–2025