{"product_id":"tune-g15-m850i","title":"BMW G15 M850i (N63TU3)","description":"\u003cp\u003e\u003cstrong\u003eLogged, verified, revised. Documented in writing. Yours to keep.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA custom bootmod3 calibration for the G15 M850i (N63TU3) — built from datalogs on your car, not a map off a shelf. The G15 is the two-door 8-Series — coupe and convertible — and its N63TU3 is a torque-rich twin-turbo V8 that responds to a calibration aimed at effortless mid-range, the kind of pull that suits a grand tourer. We start from what your engine is actually doing in fuel trims, timing, knock, and load, and revise against the next log until the math and the data agree.\u003c\/p\u003e\n\u003cp\u003eThis is a GT, not a track tool, so we tune for a clean, linear delivery you can lean on every day.\u003c\/p\u003e\n\u003ch3\u003eHow we approach it\u003c\/h3\u003e\n\u003cp\u003eMath first, datalogs second, marketing claims a distant last. We don't publish dyno numbers we can't reproduce; we tune to what your specific car does on the fuel you actually buy.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/configure\"\u003eConfigure your tune →\u003c\/a\u003e\u003c\/p\u003e","brand":"Esse Werks","offers":[{"title":"Stage 1","offer_id":43280676225085,"sku":"EW-TUNE-G15-M850I-S1","price":495.0,"currency_code":"USD","in_stock":true},{"title":"Stage 2","offer_id":43280676257853,"sku":"EW-TUNE-G15-M850I-S2","price":595.0,"currency_code":"USD","in_stock":true},{"title":"Stage 3","offer_id":43280676290621,"sku":"EW-TUNE-G15-M850I-S3","price":895.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/essewerks.com\/products\/tune-g15-m850i","provider":"Esse Werks","version":"1.0","type":"link"}