Stone Exhaust
Stone Exhaust Valvetronic Catback (Cat-Back) for Porsche Macan 95B – Switchable/Active Valved Performance Exhaust w/ Remote & OBD – Fits Macan S 3.0T (2014+ & G2) & Macan Turbo 3.6T – Dyno Proven, Anti-Drone, OPF/GPF Delete, Back Box/Muffler
Stone Exhaust Valvetronic Catback (Cat-Back) for Porsche Macan 95B – Switchable/Active Valved Performance Exhaust w/ Remote & OBD – Fits Macan S 3.0T (2014+ & G2) & Macan Turbo 3.6T – Dyno Proven, Anti-Drone, OPF/GPF Delete, Back Box/Muffler
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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Stone Exhaust switchable cat back system for Porsche Macan 95B S 3.0 V6 and Turbo 3.6 V6
Turn your Macan into the car it should have been from the factory. This Stone Exhaust rear section delivers a richer tone, sharper response and everyday refinement, with on demand valve control via a neat remote key fob and plug in OBD port module. Developed from comprehensive 3D scans of the original hardware for factory like fit, it bolts straight up and transforms the soundtrack while keeping the cabin civil when you want it quiet.
We’ve installed this kit for customers and on our own builds and the feedback has been excellent. Fitment is bang on, the valve control is smooth and reliable, and the sound is exactly what Macan owners want from a premium sports exhaust upgrade.
Why enthusiasts choose this setup
- Active, switchable valves with remote controller for Quiet, Open and Auto modes
- OBD plug in control module for quick, reversible installation
- Single piece layout with precise jig welded construction for perfect alignment
- Digitally modelled from OEM components for a genuine bolt on experience
- In house dyno verified gains with a deep, refined tone that avoids intrusive cabin boom
- 7 axis CNC mandrel bending for consistent cross section and optimal gas flow
- Advanced weld techniques at high heat joints for long term durability
Have it loud or keep it subtle
Use the handheld controller to open the valves for a more aggressive, motorsport inspired note, or close them for relaxed cruising and early morning starts. Select Auto and the system manages valve position by engine speed so you can enjoy quiet around town and a fuller roar when you lean on the throttle.
Measured performance
- Power gain: +8.48 ps at 4900 rpm
- Torque gain: +13.83 Nm at 3100 rpm
Real world improvements in flow and reduced back pressure are immediately noticeable. Results vary with mileage and supporting hardware.
OPF solution available
Running an OPF equipped Macan. Stone supplies an OPF delete configuration at no extra cost so OPF cars can be fitted without triggering a fault light. No ECU coding required to clear OPF related warnings. For road legality and emissions compliance, check local regulations.
Engineered for precision
- Reverse engineered from OEM scans to optimise tube diameter, path and bend angles
- Approximately 98 percent roundness retention through complex bends
- Crisscross and overlapping welds to maximise penetration and thermal resilience
- Mechanised spot welding for repeatability and clean finishes
Compatibility
Porsche Macan 95B platforms from 2014 onwards, including:
- Macan S 3.0T V6
- Macan S G2 3.0T V6
- Macan Turbo 3.6T V6
Part numbers
- QP503ASQ - Macan S 3.0T and Macan Turbo 3.6T
- QP503BSQ - Macan S G2 3.0T
Professional installation
The valve controller connects to the OBD port for a straightforward, plug in setup. For expert fitting and alignment, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.
Search terms to help you find the right kit
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R&D and manufacturing
Stone uses advanced simulation and scanning to analyse flow, temperature and pressure zones, iterating until the target sound and performance balance is achieved.
Video
Controller and valve overview
