{"product_id":"g5-speed-limit-defeat-wires","title":"Burger Motorsports BMS JB4 G5 N54 Speed Limiter Delete Leads for BMW 135i 335i – Vmax Top Speed Unlock\/Defeat, Governor Bypass, Speed Cap Delete, Derestrict Plug-In Harness Kit (E-N54-JB4UG-SLD)","description":"\u003cdiv\u003e\n  \u003ch2\u003eTop End Unlock Leads for BMW N54 with JB4 G5\u003c\/h2\u003e\n  \n  \u003cp\u003e\n    Release the true top speed capability of your twin-turbo N54 with these genuine Burger Motorsports plug-in leads for JB4 G5 users. Designed for BMW 135i and 335i running a JB4 G5, this simple wiring add-on lets the JB4 command removal of the factory velocity cap, delivering full de-restriction when configured correctly. Ideal for drivers seeking a governor bypass, speed cap delete, Vmax override or top end unlock without moving to a full flash.\n  \u003c\/p\u003e\n  \n  \u003cp\u003e\n    Part number: \u003cstrong\u003eE-N54-JB4UG-SLD\u003c\/strong\u003e\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eWhy this upgrade\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthentic Burger Motorsports link wires engineered for the JB4 G5 control board\u003c\/li\u003e\n    \u003cli\u003eEnables JB4-controlled top end de-restriction on compatible N54 setups\u003c\/li\u003e\n    \u003cli\u003ePerfect for BMW 135i and 335i owners who want an easy speed cap bypass solution\u003c\/li\u003e\n    \u003cli\u003eTrusted by our team and by happy MJ Modifications customers for reliable, predictable results\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eRequirements\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eJB4 with G5 board\u003c\/li\u003e\n    \u003cli\u003eBMS DATA cable or JB4 Connect Kit (Rev. 3)\u003c\/li\u003e\n    \u003cli\u003eNot required if the vehicle is already using a BMS flash\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eFitment\u003c\/h3\u003e\n  \u003cp\u003e\n    Built for N54-powered BMW 135i and 335i vehicles running a JB4 G5. If you are unsure, we offer a free compatibility check before you buy.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003ePre-dispatch compatibility check\u003c\/h3\u003e\n  \u003cp\u003e\n    Add your UK registration number or the last 7 characters of your VIN at checkout and we will confirm suitability for your BMW 135i or 335i with JB4.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eInstallation and support\u003c\/h3\u003e\n  \u003cp\u003e\n    Prefer professional fitting? Book installation with MJ Modifications in Warwickshire. Email \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e for a quote and availability. We have used this product extensively and can guide you on best practice for a seamless JB4 setup.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eManufacturer and warranty\u003c\/h3\u003e\n  \u003cp\u003e\n    Manufacturer: Burger Motorsports\n  \u003c\/p\u003e\n  \u003cp\u003e\n    Warranty: The manufacturer does not offer a warranty on this item.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eImportant safety notice\u003c\/h3\u003e\n  \u003cp\u003e\n    Operating a vehicle at high speed involves significant risk and should only be undertaken by competent drivers on a closed course. Use is subject to the manufacturer’s terms and conditions.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eSearch-friendly terms\u003c\/h3\u003e\n  \u003cp\u003e\n    BMW 135i governor delete, BMW 335i speed cap bypass, N54 top speed unlock, JB4 G5 wiring leads, Vmax override kit, BMW 1 Series 135i de-limit, BMW 3 Series 335i de-restrict, N54 tuning accessory, JB4 top end override, BMS JB4 G5 accessory, N54 Vmax removal, JB4 wiring upgrade, BMW limiter bypass, 135i 335i unrestricted top speed, JB4 data cable required, JB4 connect kit required, BMW N54 performance wiring, speed cap delete for JB4, top speed unlock wires for N54.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"BMS","offers":[{"title":"Default Title","offer_id":56008730182018,"sku":null,"price":14.75,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/G5_Speed_Limit_Defeat_Wires_1946x_d47ab920-6e98-4f5c-b163-9cd980319375.jpg?v=1764091434","url":"https:\/\/mjmodifications.co.uk\/products\/g5-speed-limit-defeat-wires","provider":"MJ Modifications","version":"1.0","type":"link"}