Mercedes Benz W212/W218, E63/CLS63 Stainless Steel Valved Catback Exhaust

Give the E63 and CLS63 the voice its engine deserves. A full stainless valved catback with a true X-pipe crossover, a valved muffler on each side and the wireless remote kit supplied.

The hand-built four-litre biturbo V8 is one of the best-sounding engines AMG has ever made, and the factory E63 exhaust spends most of its effort keeping that quiet. This system replaces the entire section from the downpipes back with mandrel-bent 304 stainless and its own valve assemblies, so the car stays civil on the school run and turns properly loud the moment you want it to.

Manufactured from 304 stainless steel with mandrel bends and TIG welds throughout, supplied complete with the valve assemblies, 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.

True X-Pipe Crossover

The two banks meet at a merged X junction under the floor, balancing exhaust pulses between them. That is what deepens the tone and evens out the delivery, rather than simply making the car louder.

Twin Valved Rear Mufflers

One muffler per side with a valved bypass, giving a genuine quiet mode and a genuinely loud one from the same system.

E63 and CLS63 Fitment

Built to the correct routing for each car, selected at checkout.

Direct Bolt-On Fitment

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

Performance Benefits

A deeper, louder V8 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 M157

Sound Characteristics

Valves Closed

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

Valves Open

Deep, thunderous V8 tone
Increased exhaust volume
Heavier overrun crackle and turbo acoustics
Aggressive cold starts

E63 or CLS63?

The E63 Sedan and the CLS63 share the M157 engine but not the rear of the car - the floor pans, hanger positions and tip locations differ, so each body takes its own system.

Select the car that matches yours at checkout. If you are unsure, our team will confirm it against your VIN before dispatch.

Vehicle Fitment

Mercedes-AMG E63 Sedan (W212, 2011-2016)
Mercedes-AMG CLS63 (C218, 2011-2018)

5.5L Twin-Turbocharged M157 V8 Engine

Select your car at checkout - the E63 Sedan and the CLS63 use different rear routing, so the systems are not interchangeable. This system is for the twin-turbo M157 cars, not the earlier 6.2 litre naturally aspirated E63, and not the S212 Estate.

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.