Mercedes E-Class W213/S213 Valved Catback Exhaust by Stone – E400 E450 E43 AMG M276 – Switchable/Active Sports Performance, Remote Valve, No Drone, OPF/GPF Friendly

Switchable cat back for Mercedes E-Class W213 and S213 V6 M276 - Stone Valvetronic for E400, E450, E43 AMG

Transform the character of your E-Class with Stone’s valve-controlled rear system. Designed around the M276 twin-turbo V6 in the W213 saloon and S213 estate, this premium switchable cat back delivers a richer soundtrack, crisper response and everyday refinement. If you are searching for a UK performance exhaust upgrade for E43 AMG, E400 or E450 that is direct-fit, drone free and beautifully made, this is the one our customers choose and recommend.

Stone’s hardware is developed using full OEM 3D scans, reverse engineering and in-house dyno validation to achieve factory-level fit with a genuine motorsport tone when you want it, and calm cruising when you do not. We have supplied and installed these systems at MJ Modifications and feedback has been consistently excellent for sound quality, build and perfect fitment.

Key reasons to upgrade

• Direct replacement cat back for Mercedes E-Class W213 and S213 with the M276 V6: E400, E450, E43 AMG
• Valve control with remote handset: open, closed and auto modes via simple OBD2 plug-in controller
• Quiet on the motorway, aggressive on throttle, no cabin drone compared with the stock rear section
• One-piece construction with precision robotic welds for strength and long-term reliability
• Engineered using 7-axis CNC bending for accurate fit and optimised gas flow
• Rigorously tested on Stone’s dyno and validated for consistent quality

Switchable sound, OEM+ manners

Choose your soundtrack at the touch of a button. Open the valves for a deep, athletic note with instant character. Close them for discreet, comfortable commuting. Leave it in auto and let the system manage valve position against preset RPM for the best blend of refinement and performance without any complicated wiring.

OPF GPF friendly installation

Running a GPF or OPF equipped car We can include an OPF delete solution free of charge to allow fitment without triggering warning lights. No ECU coding required. Ask when ordering.

Engineering highlights

• OEM-level 3D scanning and reverse engineering for exact routing and hanger placement
• 7-axis CNC mandrel bends for roundness and precision fit
• Crisscross and overlapping weld techniques in high heat zones
• Robotic spot welding for consistent penetration and durability

From bend angle to pipe geometry, Stone optimises flow, thermal balance and pressure distribution using simulation, then proves it on the dyno and on the road.

Who is it for

Enthusiasts who want a refined daily with a genuine performance tone on demand. Ideal for those searching terms like switchable exhaust for E43 AMG, sports exhaust for E400 V6, E450 V6 valve exhaust, W213 performance exhaust, S213 estate exhaust upgrade and UK Mercedes tuning parts.

Compatibility

Mercedes-Benz E-Class with M276 V6:

• W213 E400 2016–2018
• W213 E450 2019+
• W213 E43 AMG 2016–2018
• S213 E400 2016–2018
• S213 E450 2019+
• S213 E43 AMG 2016–2018

Options and part numbers

• MP530AS - Left and right pipe separated
• MP530BS - Single side two-pipes

Warranty

Stone Exhaust 2-year warranty for peace of mind.

Professional fitting

Want it installed by specialists Book your installation with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Watch and listen

Hear real-world sound clips and see the switchable valves in action below.

Gallery

Technical development

Stone engineers scan the OEM layout, analyse diameter and routing, simulate flow, heat and pressure, then refine until sound and performance are balanced. The result is a precision-fit, valve-controlled system that feels OEM+ but sounds special.

Popular search terms

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