Stone Exhaust Valved Cat-Back for BMW 530i 5 Series G30/G31 B48 2.0T (2015-2019) | Sports Exhaust Catback, OEM Valve Integration | OPF/PPF Delete | Fits 530i xDrive Touring & Saloon | AP527B

Stone Performance System for BMW 530i G30 G31 B48 with integrated valve control

Transform your G30 saloon or G31 estate with Stone’s valve-controlled rear system for the 2.0 turbo B48. This premium upgrade delivers a richer, deeper soundtrack with zero cabin boom, sharper throttle response and superb everyday manners thanks to factory valve integration. We run this setup on our own builds and customer cars and the feedback is consistently excellent.

Part number: AP527B – designed to be used with the original rear bumper.

Why enthusiasts choose this Stone system

• Factory valve integration – ECU-managed valves for seamless quiet-to-sport transition
• Optional Stone Valvetronic dual-valve control with remote for extra adjustability
• OBDII plug-in controller for straightforward integration
• One-piece layout for optimal gas flow and durability
• Machine welding and direct spot welding for strength and longevity
• 3D scanned and reverse engineered for 100 percent OEM-level fit
• Developed on the dyno for real performance and flow improvements
• No drone at motorway speeds – refined when cruising, aggressive when opened up

Fitment

• BMW 5 Series G30 530i and 530i xDrive – 2015 to 2019
• BMW 5 Series G31 530i Touring and 530i xDrive Touring – 2016 to 2019
• B48 2.0 turbo petrol applications

How it sounds and drives

Cold starts and full throttle deliver a sporty, characterful note. Close the valves and it settles into a calm, refined tone for daily use. Flow-optimised routing and precise bends improve scavenging for a crisper response from your B48 without unwanted resonance in the cabin.

OPF solution included

Running a vehicle with a particulate filter No problem. An OPF delete solution is included at no extra cost to avoid warning lights. No ECU coding is required to clear OPF-related errors.

Engineered for accuracy, built for reliability

• 3D scanning and CAD reverse engineering of the OEM system for exact alignment
• 7-axis CNC bending for exceptional roundness and consistent internal diameter
• Crisscross and overlapping welds at heat-critical joints for long-term durability
• Mechanical welding arms with direct spot welding for consistent penetration

Our experience

We have installed this Stone system on multiple G30 and G31 530i builds. Customers love the switchable character, the quality of the welds and the perfect fit. It is a genuine upgrade for sound, response and everyday refinement.

Professional installation

Want it fitted correctly first time Book in with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and availability.

Warranty

Stone Exhaust 2 year warranty.

Watch and listen

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