{"product_id":"stone-exhaust-porsche-e3-cayenne-turbo-4-0t-cat-back-valvetronic-exhaust-system","title":"Stone Exhaust Valved Cat-Back (Catback) for Porsche Cayenne Turbo V8 4.0T (E3) 2019-on - Valvetronic\/Active Switchable Sports Performance Exhaust, OBDII\/OBD2 Remote Plug \u0026 Play, OPF\/GPF Compatible, Drone-Free QP511SQ","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003ch2\u003eQP511SQ Stone Exhaust Cat Back for Porsche Cayenne Turbo V8 4.0 E3 2019 on\u003c\/h2\u003e\n\n  \u003cp\u003e\n    Give your Cayenne Turbo V8 the soundtrack and response it deserves. This Stone Exhaust switchable cat back transforms throttle feel and cabin character, delivering a deep, motorsport-inspired note under load with calm, drone free cruising on the motorway. Developed specifically for the E3 platform, it retains everyday refinement while unlocking serious theatre when you want it.\n  \u003c\/p\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eDirect replacement system for Porsche Cayenne Turbo V8 4.0 E3 2019 onward\u003c\/li\u003e\n    \u003cli\u003eElectronically controlled valves with handheld remote - choose Loud, Quiet or Auto by rpm\u003c\/li\u003e\n    \u003cli\u003ePlug in OBD port controller with adjustable valve opening threshold\u003c\/li\u003e\n    \u003cli\u003eNo boom or resonance at steady speeds, refined in-cabin tone\u003c\/li\u003e\n    \u003cli\u003e3D scanned and reverse engineered for precise OE style fitment\u003c\/li\u003e\n    \u003cli\u003eDyno developed and validated by Stone for sound and flow\u003c\/li\u003e\n    \u003cli\u003eOne piece bends and precision welding for optimal gas velocity\u003c\/li\u003e\n    \u003cli\u003ePart number: QP511SQ\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eSwitchable valves, three driving characters\u003c\/h3\u003e\n  \u003cp\u003e\n    Use the supplied controller to flick between modes. Loud opens the valves for maximum presence and performance. Quiet keeps the flaps closed for early starts and town driving. Auto uses your chosen rpm point so the valves open only when you are on it. The control unit plugs into the diagnostic port so setup is fast and tidy.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eReady for OPF and GPF vehicles\u003c\/h3\u003e\n  \u003cp\u003e\n    Running a particle filter equipped Cayenne Turbo V8 4.0 E3. Stone includes an OPF solution at no extra cost. It allows this system to be fitted to OPF cars without warning lights, so ECU coding is not required.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eEngineering highlights\u003c\/h3\u003e\n  \u003cp\u003e\n    Stone scans the factory exhaust to capture every dimension, then iterates routing, diameter and bend geometry using flow, thermal and pressure simulation. A 7 axis CNC bending process keeps up to 98 percent roundness through tight radii with accuracy down to 0.025 mm to minimise turbulence. Crisscross and overlapping weld techniques add strength at high temperature junctions, while robotic spot welding delivers consistent penetration. The result is a robust, high flow system that looks as good as it sounds.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhy choose this upgrade\u003c\/h3\u003e\n  \u003cp\u003e\n    We have installed this system on customer Cayenne Turbo builds and the feedback has been outstanding. Owners love the instant change in character, the crisp valve response from the remote and the lack of cabin drone on longer journeys. If you want a premium switchable exhaust for your Cayenne that blends quality, performance and everyday civility, this is it.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eFitment\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003ePorsche Cayenne Turbo V8 4.0 E3 2019 onward\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation\u003c\/h3\u003e\n  \u003cp\u003e\n    The valve controller is plug and play via the OBD port and can be set up in minutes. Professional fitting is recommended for the exhaust hardware. MJ Modifications offers installation at our Warwickshire workshop. For a fitting quote please email info@mjmodifications.co.uk.\n  \u003c\/p\u003e\n\n  \u003ch3\u003ePart number and warranty\u003c\/h3\u003e\n  \u003cp\u003e\n    Part number: QP511SQ\u003cbr\u003e\n    Manufacturer: Stone Exhaust\u003cbr\u003e\n    Warranty: 2 year Stone Exhaust warranty\n  \u003c\/p\u003e\n\n  \u003cdiv style=\"margin: 16px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/1_9336c8b0-c9ea-4822-891c-83490f630707.jpg?v=1572705528\" alt=\"3D scanning and reverse engineering for Cayenne Turbo V8 E3 Stone Exhaust upgrade\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"margin: 16px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/S__53968900_600x600.jpg?v=1591014788\" alt=\"Stone Exhaust switchable cat back for Porsche Cayenne Turbo 4.0 E3\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"margin: 16px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/bending.jpg?v=1572739395\" alt=\"7 axis CNC bending on Stone Cayenne Turbo exhaust system\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"margin: 16px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_Art_of_Welding_-_1_1024x1024.jpg?v=1572828150\" alt=\"Stone Exhaust weld quality for Porsche Cayenne Turbo E3 system\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"margin: 16px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_Art_of_Welding_-_2_1024x1024.jpg?v=1572828178\" alt=\"Robotic spot welding for durability on Stone Exhaust systems\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eSound and install videos\u003c\/h3\u003e\n  \u003cp\u003e\u003cstrong\u003eCayenne Turbo V8 4.0 E3 switchable cat back sound\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cdiv style=\"position:relative; padding-bottom:56.25%; height:0; overflow:hidden;\"\u003e\n    \u003ciframe src=\"https:\/\/www.youtube.com\/embed\/FGVdJIgjdkY\" title=\"Stone Exhaust Cayenne Turbo V8 E3 sound demonstration\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen style=\"position:absolute; top:0; left:0; width:100%; height:100%;\"\u003e\u003c\/iframe\u003e\n  \u003c\/div\u003e\n\n  \u003cp style=\"margin-top:16px;\"\u003e\u003cstrong\u003eValve controller installation overview\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cdiv style=\"position:relative; padding-bottom:56.25%; height:0; overflow:hidden;\"\u003e\n    \u003ciframe src=\"https:\/\/www.youtube.com\/embed\/V5c4VEyO1EM\" title=\"Stone valve control install guide\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen style=\"position:absolute; top:0; left:0; width:100%; height:100%;\"\u003e\u003c\/iframe\u003e\n  \u003c\/div\u003e\n\n  \u003cp style=\"margin-top:24px; font-size:12px; color:#666;\"\u003e\n    Search terms: Cayenne Turbo V8 4.0 E3 sports exhaust, Porsche Cayenne Turbo switchable valve system, remote controlled exhaust flaps, OBD controller exhaust upgrade, OPF GPF friendly cat back, Porsche Cayenne performance exhaust UK, Cayenne Turbo sound upgrade, Stone Exhaust QP511SQ, high flow exhaust for Porsche SUV, drone free exhaust Cayenne Turbo, Porsche Cayenne 4.0 twin turbo exhaust system, UK fitting Warwickshire.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Flat Cut Gloss Carbon Fibre (102mm)","offer_id":56006647808386,"sku":null,"price":4470.72,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/Flat_Cut_Gloss_Carbon_Fibre_102mm_1946x_faecc75b-8c40-4906-a288-232737b9f04f.png?v=1764059699","url":"https:\/\/mjmodifications.co.uk\/products\/stone-exhaust-porsche-e3-cayenne-turbo-4-0t-cat-back-valvetronic-exhaust-system","provider":"MJ Modifications","version":"1.0","type":"link"}