Promod Works Mercedes CLS63 AMG W218 Sports Cat Downpipe System – 200 Cell High-Flow Cats | Polished Stainless Steel

Promod Works – Mercedes CLS63 AMG Sports Cat Downpipe System with 200 Cell High-Flow Catalytic Converters

These complete downpipes with sports cats are purpose-built for the Mercedes CLS63 AMG (W218) with the M157 5.5L twin-turbo V8 engine. Crafted from T304 polished stainless steel and finished to a mirror shine, this system delivers measurable performance gains, a more aggressive exhaust note, and a premium under-bonnet appearance that matches the prestige of your AMG.

Key Features

• 200 Cell High-Flow Sports Catalytic Converters – Dramatically improved exhaust gas flow over OEM cats, without going full decat. Retains some emissions compliance while unlocking power potential.
• T304 Polished Stainless Steel Construction – Hand-polished to a showroom mirror finish. Built to last and resist corrosion in all UK conditions.
• Promod Works Branded Sport Cats – Laser-etched stainless badge on each catalytic converter canister. A performance part that looks as good as it performs.
• Direct OEM Fitment – Designed to bolt directly onto the factory turbo outlets and mate to the OEM or aftermarket mid-pipe/cat-back system. No fabrication required.
• V-Band Clamp Connections – Quick and easy removal for dyno runs, track days, or cat-delete swaps. No cutting required.
• Complete Twin Downpipe Set – Includes both left and right downpipes with integrated 200 cell sport cats. Full system as pictured.
• Compatible with OEM & Aftermarket Cat-Back Systems – Pairs directly with factory Mercedes exhaust or aftermarket systems including Capristo, Milltek, Quicksilver, and more.
• Increased Turbo Response – Reduced exhaust back-pressure means faster spool, more mid-range torque, and stronger top-end pull.
• Performance Gains – When combined with an ECU remap, expect measurable gains in both power and torque across the rev range.

Vehicle Compatibility

Note: Fits all vehicles equipped with the M157 5.5L BiTurbo V8 engine (twin-turbocharged). Not compatible with older M113K supercharged engines (CLS55 AMG).

What's Included

• 2x Polished Stainless Steel Downpipes (left & right)
• 2x Promod Works 200 Cell Sport Catalytic Converters (integrated)
• All necessary mounting hardware

Installation Notes

• Professional installation recommended. Requires a ramp and standard exhaust tools.
• An O2 sensor extension or ECU tune may be required to prevent a Check Engine Light (CEL) after fitting sport cats.
• For maximum performance, we recommend pairing with an ECU remap following installation.
• Fits directly to the OEM turbo outlet flanges. No additional adaptors required.

Important Notice

This product is designed for motorsport, track day, and off-road use. Fitting sports cats in place of OEM catalytic converters may affect emissions compliance and road legality depending on your region. Please check local regulations before fitting. Promod Works accepts no responsibility for use that does not comply with applicable road traffic legislation.

About Promod Works

Promod Works is a UK-based manufacturer specialising in high-performance exhaust systems, custom fabrication, and precision-engineered components for performance and modified vehicles. Every product is built to exacting standards using premium materials, with a commitment to quality that shows in every weld, every bend, and every mirror-polished finish.