{"product_id":"valvetronic-designs-porsche-911-turbo-991-full-valved-exhaust-system","title":"Valvetronic Designs Valved Race Exhaust System for Porsche 911 Turbo 991.1 \/ 991.2","description":"\u003cp\u003ePorsche 991 Turbo \/ Turbo S – Titanium Valved Exhaust System\u003c\/p\u003e\u003cp\u003eGrade 5 Titanium • Center X-Pipe • True Motorsport Tone\u003c\/p\u003e\u003cp\u003eOverview\u003c\/p\u003e\u003cp\u003eThe 991 Turbo is the benchmark for all-around performance—but like every turbocharged Porsche, the stock soundtrack falls short. Valvetronic Designs fixes that at the source. Our system starts with CAD-designed, CFD-tested exhaust manifolds to sharpen pulse timing and raise pitch for a cleaner, more motorsport-inspired note. Downstream, a valved titanium rear section delivers dual personalities on demand—raw and unfiltered when you want it, refined and comfortable when you need it.\u003c\/p\u003e\u003cp\u003eSound Dynamics\u003c\/p\u003e\u003cp\u003eValves Open: After the turbos, gases travel straight ~13 inches to atmosphere for an uncorrupted, razor-edged Porsche wail—crisp up top with aggressive shift pops.\u003c\/p\u003e\u003cp\u003eValves Closed: Flow is routed through two quad-chambered mufflers for a substantial drop in volume and a calm cabin demeanor.\u003c\/p\u003e\u003cp\u003eCenter X-Pipe: Smooths pulse interaction, kills drone, and adds a polished, high-frequency character throughout the rev range.\u003c\/p\u003e\u003cp\u003ePerformance \u0026amp; Engineering\u003c\/p\u003e\u003cp\u003eCFD-Validated Manifolds: Optimized runner geometry improves pulse energy, response, and tone.\u003c\/p\u003e\u003cp\u003eGrade 5 Titanium Construction: Extreme strength-to-weight with superior heat resistance.\u003c\/p\u003e\u003cp\u003eVacuum-Actuated Valves: Instant, reliable control of volume and character.\u003c\/p\u003e\u003cp\u003ePrecision TIG Welds: Hand-finished for durability and a showpiece finish.\u003c\/p\u003e\u003cp\u003eWeight Savings: 9.5 lb lighter than the factory system.\u003c\/p\u003e\u003cp\u003e100% Reversible: Bolt-on design—return to stock anytime.\u003c\/p\u003e\u003cp\u003eVisual Details\u003c\/p\u003e\u003cp\u003eSignature Tips: Premium finishes that complement the 991 Turbo’s rear profile.\u003c\/p\u003e\u003cp\u003eFitment\u003c\/p\u003e\u003cp\u003e2014–2019 Porsche 911 (991) Turbo\u003c\/p\u003e\u003cp\u003e2014–2019 Porsche 911 (991) Turbo S\u003c\/p\u003e","brand":"Valvetronic Designs","offers":[{"title":"Grade 5 Titanium \/ Race Catback System","offer_id":55671472980287,"sku":"POR.991.TUR.VSES.TI","price":7000.99,"currency_code":"CAD","in_stock":false},{"title":"Grade 5 Titanium \/ + RACE FREE FLOW HEADERS","offer_id":55671473013055,"sku":"POR.991.TUR.VSES.FFH.TI","price":8401.19,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0898\/1348\/3839\/files\/valvetronic-4676910350372-1.jpg?v=1789847610","url":"https:\/\/foreignautomotive.ca\/products\/valvetronic-designs-porsche-911-turbo-991-full-valved-exhaust-system","provider":"Foreign Automotive","version":"1.0","type":"link"}