Mercedes-AMG C63 / C63 S W205 2015+ M177 4.0TT 3 inch Mirror Polished Stainless Competition Downpipes

Product Overview

These 3 inch competition series downpipes are made from 1.5 mm stainless steel with a mirror polished finish and are listed for the 2015-onwards Mercedes-AMG C63 and C63 S (W205) with the M177 4.0TT V8. The competition (no cat) configuration replaces the factory catalytic converter downpipes for motorsport and track-focused builds.

Key Features and Benefits

• 3 inch diameter
• 1.5 mm stainless steel construction
• Mirror polished finish
• Competition configuration with no catalytic converter
• Designed for the M177 4.0TT V8
• Pairs with an aftermarket midpipe or catback for a full system
• Bright polished look

Vehicle Compatibility

The supplier lists fitment for 2015+ Mercedes-AMG C63 and C63 S with the M177 engine, with year fields of 2015-2019. This fitment is supplier-stated and has not been independently verified. Body style and facelift differences may apply, so please confirm compatibility with us before ordering.

Product Specifications

• Product type: downpipes
• Diameter: 3 inch
• Material: stainless steel
• Thickness: 1.5 mm
• Finish: mirror polished
• Configuration: competition, no cat
• Engine: M177 4.0TT
• Package size: 68 x 65 x 20 cm; gross weight approx. 9.6 kg

Installation and Usage

Downpipe replacement on the M177 is complex and should be carried out by a specialist performance workshop. Removing catalytic converters requires ECU calibration to manage oxygen sensor readings and avoid fault codes. After installation, check flange seals, sensor connections and heat shield clearance, and recheck fasteners after initial heat cycles.

Package Contents

Sold as a single item: the downpipe set as pictured. Gaskets, studs and sensor fittings have not been confirmed by the supplier.

Important Fitment Notice

Please send us your VIN before ordering so we can help confirm fitment. Competition (catless) downpipes are for off-road and motorsport use only. Removing catalytic converters from a road vehicle in New Zealand may breach emissions rules and result in a WoF failure; compliance is the owner's responsibility. Images are for reference only.