Stone Exhaust Volvo V40 T4 1.6T (2015+) Valved Cat-Back / Catback Sports Exhaust Y555/Y556 – Switchable Valvetronic Back Box, OBD2/OBDII Remote Plug & Play, No Drone, OPF/GPF Delete Friendly – Performance Exhaust System OP501S

Switchable Sports Exhaust for Volvo V40 T4 1.6 Turbo 2015 onwards - Y555 Y556 - Part No. OP501S

Transform the character of your Volvo V40 T4 1.6 turbo with Stone Exhaust’s premium switchable rear section. This performance cat back system delivers a deep, refined soundtrack on demand, genuine gains proven on the dyno, and flawless factory-style fit. If you are searching for a V40 T4 1.6T sports exhaust upgrade, a remote controlled valved system, or a motorway friendly exhaust with no cabin boom, this is the standout choice.

Developed using 3D scanning and reverse engineering of the original equipment layout, the Stone Exhaust OP501S bolts straight on, integrates seamlessly via the OBD port, and gives you quiet or aggressive sound at the touch of a button. We run this system ourselves and our customers love the tone, the lack of resonance on long journeys, and the perfect alignment out of the box.

Highlights that enthusiasts want

• Direct bolt-on for Volvo V40 T4 1.6 turbo petrol Y555 Y556 2015 onwards
• Switchable valve control for discreet commuting or full-blooded soundtrack when you want it
• OBD2 plug-in controller and wireless remote for fast, clean installation with no splicing
• ON, OFF and AUTO modes with RPM-based actuation for intelligent sound management
• No motorway resonance and no droning in the cabin
• Reverse engineered from the OE system for true OEM-style fit and finish
• Dyno developed for real-world performance improvements in power and response
• One-piece architecture for strength, simple alignment and long-term durability

Sound control via OBD plug-in remote

Choose your soundtrack in seconds:

• ON - valves open for maximum flow and a richer, more purposeful tone
• OFF - valves closed for near-stock civility on early starts and long drives
• AUTO - automatic opening at a preset engine speed for the best of both

The OBDII controller is genuinely plug and play. No complicated wiring. No coding.

Engineering that delivers

• Comprehensive R&D with 3D scanning of the factory system for precise routing
• 7-axis CNC bending achieving up to 98 percent roundness for excellent gas flow
• Tight manufacturing tolerance under 0.025 mm for consistent, repeatable quality
• Crisscross and overlapping weld techniques to handle prolonged high temperatures
• Direct spot welds by mechanical welding arms for strength and a clean look

OPF and GPF friendly

Running a V40 with an OPF or GPF particulate filter Y555 Y556 platform cars? An OPF delete solution is available at no extra charge, allowing installation without warning lights. No ECU coding required.

Compatibility

• Vehicle: Volvo V40 T4 1.6 turbo petrol Y555 Y556
• Model years: 2015 onwards
• Engine: 1.6T

Installation and fitting

This cat back is a straightforward fit with an easy plug-in OBD controller. For the best results and alignment we recommend professional installation.

Prefer us to fit it for you? MJ Modifications offers in-house fitting in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Part number

OP501S

Manufacturer and warranty

Brand: Stone Exhaust

Warranty: 2 years from Stone Exhaust

Why owners pick this V40 upgrade

Deep, sporty tone without motorway boom. Instant switch between quiet and loud. Real performance gains from a system that fits like stock. Feedback from our customers mirrors our own experience - this is the V40 T4 1.6T exhaust upgrade that nails sound, quality and value in one package.

Search terms customers use: Volvo V40 T4 1.6 turbo sports exhaust, V40 1.6T valved exhaust, remote controlled exhaust Volvo V40, plug in OBD valve controller, V40 back box upgrade, non drone exhaust Volvo V40, Y555 Y556 cat back, OPF delete compatible, GPF friendly exhaust, stone exhaust OP501S.