Mercedes Benz W205, C43 AMG Stainless Steel Valved Catback Exhaust

Give the W205 C43 the voice it should have had from the factory. A full stainless valved catback with twin valved mufflers, a balanced crossover and the wireless remote kit supplied.

The M276 twin-turbo V6 is one of the better-sounding engines AMG has built, and the factory exhaust spends most of its effort hiding that. This system replaces the whole rear section with mandrel-bent 304 stainless and its own valve assembly, so the car stays civil at part throttle and turns genuinely loud the moment you want it to.

The crossover is what separates it from a plain dual system. Balancing pulses between the two banks deepens the tone and smooths the delivery, which is why it sounds fuller at the same volume.

Manufactured from 304 stainless steel with mandrel bends and TIG welds throughout, supplied complete with the valve assembly, remote kit and all hardware.

Key Features

Independent Varex Valve System

Rather than reusing the restricted factory valves, this system operates its own dedicated valve assembly with complete travel in both directions. Sealed when closed for a quieter OEM+ driving experience, and fully unobstructed when open for a fully aggressive exhaust tone.

Wireless Remote Kit Supplied

Valve operation is handled entirely by the supplied remote, so the volume is yours to choose rather than the car's. The system does not connect to the factory valve motors.

304 Stainless Steel Construction

Mandrel-bent 304 stainless throughout for consistent bore, corrosion resistance and long service life.

Balanced Crossover

Balances exhaust pulses between the two banks of the V6, deepening the tone and evening out the delivery through the mid range.

Precision TIG Welded

Clean, strong welds built to handle exhaust temperature cycling and hard driving.

Direct Bolt-On Fitment

Fits at the factory mounting points and hangers. No cutting and no fabrication.

Performance Benefits

A deeper, louder exhaust note with the valves open
Near-standard volume with the valves closed
Reduced restriction through the whole rear section
Sharper throttle response
Reduced weight over the factory system
A strong foundation for a tuned M276

Sound Characteristics

Valves Closed

Refined and comfortable cruising sound
Minimal cabin drone
Ideal for everyday driving and long-distance trips

Valves Open

Deep, hard-edged V6 tone with the crossover giving it real depth
Increased exhaust volume
Enhanced spool and overrun acoustics from both turbochargers
Sportier cold starts

Vehicle Fitment

Mercedes-AMG C43 (W205, 2016-2021)

3.0L Twin-Turbocharged M276 V6 Engine

This system is for the C43. The E43 uses a different catback - see our W213 E43 listing.

Please Note

Professional installation is recommended. Exhaust sound will vary depending on whether the factory or aftermarket downpipes are fitted.

Check your local road rules before fitting. Exhaust noise requirements vary by state and a vehicle must remain compliant for road use.

Why Choose Proven Performance Parts

We specialise in high-performance parts for European vehicles - including Volkswagen GTI & R models, Audi S/RS platforms, and Mercedes-AMG applications. Every product we offer is carefully selected for its quality, fitment, and real-world performance - tested by enthusiasts, for enthusiasts.