{"product_id":"renntech-performance-ecu-upgrade-for-mercedes-benz-w221-s-550-v8-biturbo","title":"RennTech Performance ECU Upgrade For Mercedes-Benz W221 S 550 V8 BiTurbo","description":"\u003ch3\u003e\u003cspan style=\"text-decoration: underline;\"\u003eDescription:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cdiv id=\"tabs-1\" aria-labelledby=\"ui-id-1\" role=\"tabpanel\" class=\"ui-tabs-panel ui-corner-bottom ui-widget-content\" aria-hidden=\"false\"\u003e\n\u003cdiv id=\"pro_desc\" class=\"product-single__description rte\" itemprop=\"description\"\u003e\n\u003cdiv id=\"tabs-1\" aria-labelledby=\"ui-id-1\" role=\"tabpanel\" class=\"ui-tabs-panel ui-corner-bottom ui-widget-content\" aria-hidden=\"false\"\u003e\n\u003cdiv id=\"pro_desc\" class=\"product-single__description rte\" itemprop=\"description\"\u003e\n\u003cp\u003eRennTech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal. RennTech proprietary tuning module stores both the RennTech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be reflashed at any time as many times as you wish.\u003c\/p\u003e\n\u003cp\u003eRennTech intermediate level ECU upgrade for the Mercedes M278 engine still offers huge gains in performance across the entire RPM range, but with a slightly reduced peak HP and torque from our standard tune.\u003c\/p\u003e\n\u003cp\u003eThis is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline components or for areas and countries with extreme altitudes, temperatures or fuel quality concerns.\u003c\/p\u003e\n\u003cp\u003eRennTech intermediate ECU tune increases performance from 429 HP and 516 lb\/ft torque up to 510 HP and 585 lb\/ft at the crank! This is a slight reduction from our standard tune but still offers white knuckle performance at one of the most affordable price points in the tuning market.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan style=\"text-decoration-line: underline;\"\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003e\u003cspan style=\"text-decoration: underline;\"\u003eFeatures:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eWe have found the M278 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz. We typically see higher baseline numbers than claimed by the factory\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan style=\"color: #ff2a00;\"\u003ePower gains are calculated based on stock numbers measured by RENNtech. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eCrank Performance Numbers are calculated with a 14% Drivetrain loss on RWD vehicles.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eRennTech numbers will be dependent on conditions and fuel quality. 91+ Octane gasoline is mandatory with this Performance Upgrade.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eStates known for poor fuel quality have to be supplied with a lower power setup\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan style=\"text-decoration: underline;\"\u003eFeatures:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eECU Upgrade 500HP \/ 625LB-FT\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eGains: +52HP \/ +87LB-FT\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eLong-lasting and driver reliability\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSignificant gains in horsepower\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncreases the performance\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSignificant gains torque \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncreasing the engine's rev limiter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eIncredible performance gains\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan style=\"text-decoration: underline;\"\u003eStock Performance:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e429 HP @ 5,500rpm; 516 LB-FT @ 2,000-4,500rpm\u003c\/li\u003e\n\u003cli\u003e448 HP @ 5,500rpm; 538 LB-FT @2,800-3,900rpm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan style=\"text-decoration: underline;\"\u003eModified Performance:\u003cbr\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e 500 HP @ 5,500rpm; 625 LB-FT @ 3,700rpm\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e 430whp @ 5,500rpm; 538wtq @ 3,700rpm\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003eVehicle Fitment:\u003c\/span\u003e   \u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e2012\u003cspan\u003e Mercedes-Benz\u003cspan\u003e \u003c\/span\u003eW221 S 550 4.7L V8 BiTurbo\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2013\u003cspan\u003e Mercedes-Benz\u003cspan\u003e \u003c\/span\u003eW221 S 550 4.7L V8 BiTurbo\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan style=\"text-decoration: underline;\"\u003eNote:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eImages are for representation purpose only and may differ depending on application.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"RennTech","offers":[{"title":"Default Title","offer_id":51929814532388,"sku":"ECU:54.221.S550BI","price":2240.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0671\/6801\/0532\/files\/charger_e1f7055c-b9aa-41f2-9395-5be1748ad3c4.jpg?v=1768443478","url":"https:\/\/autohousesupply.com\/products\/renntech-performance-ecu-upgrade-for-mercedes-benz-w221-s-550-v8-biturbo","provider":"AutoHouseSupply","version":"1.0","type":"link"}