{"product_id":"porsche-boxster-spyder-cayman-gt4-3-8-ecu-tune-981","title":"Porsche Boxster Spyder \/ Cayman GT4 3.8 ECU Tuning – Optimized Performance | 981 2015–2016","description":"\u003cp\u003eThis isn't a generic flash. Our \u003cstrong\u003e981 Boxster Spyder and Cayman GT4 3.8 flat-six calibrations\u003c\/strong\u003e are developed in-house, optimized on the dyno, and tested on the street and track. Every map is built around your fuel, your hardware and how you actually drive the car — real gains with factory-level refinement and reliability.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eEstimated on a healthy car with known-good fuel:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e370 hp → 405 hp\u003c\/strong\u003e — estimated gain of +35 hp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e309 lb-ft → 347 lb-ft\u003c\/strong\u003e — estimated gain of +38 lb-ft\u003c\/li\u003e\n\u003cli\u003eFuel maps available for \u003cstrong\u003e91, 93 and 100 octane\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSharper throttle response and revised rev limits\u003c\/li\u003e\n\u003cli\u003eCalibrated for consistent performance in all conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e981 Boxster Spyder and Cayman GT4\u003c\/strong\u003e share the 3.8L naturally aspirated flat-six. Be realistic about what a flash does on a naturally aspirated engine: there is no boost to raise, so the gains come from ignition timing, fuelling, throttle mapping and rev limits. These two cars respond better than most NA Porsches because Porsche shipped them with a deliberately conservative calibration, but the numbers above are still a sharpening rather than a transformation. If you want a bigger step on a GT4 or Spyder, exhaust is where the next real gain lives — and the calibration can then be developed around it.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCustom ECU calibration developed around your fuel, hardware and driving preference\u003c\/li\u003e\n\u003cli\u003eOptimized ignition timing, fuelling and rev limits for your specific car\u003c\/li\u003e\n\u003cli\u003eThrottle response and drivability refinement\u003c\/li\u003e\n\u003cli\u003eFuel map matched to the octane you actually run — 91, 93 or 100\u003c\/li\u003e\n\u003cli\u003eOBDII data cable shipped to you\u003c\/li\u003e\n\u003cli\u003eSame-day file turnaround once we have your stock read\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat we need from you:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYour factory stock file, read with the cable we send you\u003c\/li\u003e\n\u003cli\u003eA complete list of current modifications\u003c\/li\u003e\n\u003cli\u003eVehicle details and VIN\u003c\/li\u003e\n\u003cli\u003eAn honest description of the car's mechanical condition and service history\u003c\/li\u003e\n\u003cli\u003eThe octane you run day to day\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSupported Vehicles:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePorsche Boxster Spyder (981) — 3.8L naturally aspirated flat-six, 2015–2016\u003c\/li\u003e\n\u003cli\u003ePorsche Cayman GT4 (981) — 3.8L naturally aspirated flat-six, 2015–2016\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to order:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1. Order online.\u003c\/strong\u003e We ship you an OBDII data cable — typically 2–3 days to arrive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2. Read your stock file.\u003c\/strong\u003e Plug the cable into your OBD port, upload your factory file, then email it to us with a list of your current modifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3. Get your file back the same day.\u003c\/strong\u003e We email your custom calibration back the day we receive your stock read — and we'll make sure you're happy with it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eIn the Southern California area?\u003c\/strong\u003e \u003ca href=\"\/pages\/contact\"\u003eGet in touch\u003c\/a\u003e and we can tune your car in person instead.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBefore you order:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower figures are estimates, not guarantees.\u003c\/strong\u003e Results vary with fuel quality, altitude, ambient temperature, mechanical condition, supporting modifications and dyno methodology.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical condition\u003c\/strong\u003e — tuning raises cylinder pressure and driveline load. The car must be sound first. Pre-existing faults revealed or accelerated by tuning are not our responsibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccurate information required\u003c\/strong\u003e — we build the file from what you tell us. An unmodified stock read and an honest description of the car, its modifications and its condition are required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e — an ECU modification will likely void any remaining factory powertrain warranty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegal use\u003c\/strong\u003e — certain calibrations are for off-road and competition use only. Compliance with federal, state and local emissions law is the buyer's responsibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRisk and liability\u003c\/strong\u003e — the customer assumes the risk of modification. Our liability is limited to the price of the tuning service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Tuning services are non-refundable once the file has been delivered. The service is complete at delivery. Full terms are on our Terms of Service page.\u003c\/p\u003e\n\n\u003cp\u003eQuestions about your specific car? \u003ca href=\"\/pages\/contact\"\u003eGet in touch\u003c\/a\u003e — we're happy to confirm the right calibration before you order.\u003c\/p\u003e\n\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eFlatSixSpirit\u003c\/strong\u003e — Premium Porsche Performance Parts\u003cbr\u003e\nRemote Delivery · Custom Calibration\u003c\/p\u003e","brand":"FlatSixSpirit","offers":[{"title":"Tune Only","offer_id":50063298887930,"sku":null,"price":1988.0,"currency_code":"USD","in_stock":true},{"title":"Tune + BMC Performance Filter Kit","offer_id":50139879145722,"sku":null,"price":2187.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0855\/2611\/8650\/files\/porsche-981-boxster-spyder-cayman-gt4-3-8-ecu-tuning.png?v=1787091651","url":"https:\/\/www.flatsixspirit.com\/products\/porsche-boxster-spyder-cayman-gt4-3-8-ecu-tune-981","provider":"FlatSixSpirit","version":"1.0","type":"link"}