{"title":"DUAL DIFF MOUNTS","description":"","products":[{"product_id":"btk-dual-differential-mount-g80m3-g82m4-g87m2-s58","title":"BTKUSA Dual Differential Mount G8X S58","description":"\u003cp\u003e\u003cstrong\u003eFOR INTERNATIONAL ORDERS PLEASE EMAIL US BUILTTOKILL@YAHOO.COM OR DM US ON IG \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003eMADE IN SAN CLEMENTE, CA🇺🇸\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eALL HARDWARE FOR ASSEMBLY INCLUDED \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eINSTALL GUIDE ON @BUILTTOKILLUSA IG OR RVNGRACEWORKS YOUTUBE \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003eThe \u003c\/span\u003e\u003cstrong\u003eBuiltToKillUSA Differential Dual Mount\u003c\/strong\u003e\u003cspan\u003e is designed to reinforce one of the G8X platform’s known weak points. By utilizing the unused factory secondary bushing location, it adds a second support to keep the differential stable under hard acceleration, aggressive launches, and spirited driving. This reduces flex and sharpens overall driveline response.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003einstallation is super simple. No disassembly of oem components needed. Insert the bushing assemble the mount on diff and BOOM…Unparalleled driveline support \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cem\u003e\u003c\/em\u003eWHAT IS A DUAL DIFF MOUNT AND HOW CAN IT BENEFIT MY BUILD?\u003c\/strong\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e1. \u003c\/span\u003e\u003cspan\u003eImproved load distribution\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe mount ties both sides of the differential into the subframe instead of relying on a single ear or bushing.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThis spreads torque load more evenly under hard acceleration, launches, and aggressive shifts.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThat’s especially important on higher-torque cars where the diff wants to rotate upward.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e2. \u003c\/span\u003e\u003cspan\u003eReduced differential movement\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe billet bridge + side arms strongly limit diff wind-up and rotation.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLess movement = more consistent driveline geometry.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eThis directly helps with:\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eReduced wheel hop\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMore predictable traction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLess shock loading on axles and bushings\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e3.  \u003c\/span\u003e\u003cspan\u003eStructural rigidity \u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAll US 6061 machined aluminum \u003c\/li\u003e\n\u003cli\u003eWeighs only 20 oz for whole assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOur Type III hard anodized\u003c\/span\u003e\u003cspan\u003e, also called \u003c\/span\u003e\u003cspan\u003ehard coat anodizing\u003c\/span\u003e\u003cspan\u003e, is a surface treatment applied electrically that greatly enhances the aluminum’s properties. Key benefits include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e    •    Extreme hardness \u0026amp; wear resistance\u003c\/span\u003e\u003cspan\u003e — significantly harder than typical anodizing and often compared to hardened steels in surface properties.\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e    •    Thick protective oxide layer\u003c\/span\u003e\u003cspan\u003e that resists scratching, abrasion and corrosion.\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e    •    Better surface durability under stress\u003c\/span\u003e\u003cspan\u003e — ideal for high-use parts.\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e    •    Good chemical resistance\u003c\/span\u003e\u003cspan\u003e and improved ability to retain lubricants.\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis coating is compliant with \u003c\/span\u003e\u003cspan\u003eMIL-A-8625 Type III standards\u003c\/span\u003e\u003cspan\u003e, which is considered a \u003c\/span\u003e\u003cspan\u003emil-spec (military grade)\u003c\/span\u003e\u003cspan\u003e finish for aluminum parts that see heavy use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eFITS G80M3\/G82\/G83 M4\/G87M2\u003c\/strong\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"No Bushing \/ Type 3 Hard Anodized","offer_id":45202671271980,"sku":null,"price":549.99,"currency_code":"USD","in_stock":true},{"title":"No Bushing \/ Raw Billet","offer_id":45204201111596,"sku":null,"price":524.99,"currency_code":"USD","in_stock":true},{"title":"80A Bushing (needed for installation) \/ Type 3 Hard Anodized","offer_id":45202671304748,"sku":null,"price":599.99,"currency_code":"USD","in_stock":true},{"title":"80A Bushing (needed for installation) \/ Raw Billet","offer_id":45204201144364,"sku":null,"price":574.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/8104\/2732\/files\/IMG-1653.jpg?v=1769160163"},{"product_id":"btkusa-dual-differential-mount-g-series-m240i-m340i-m440i-a9x-supra","title":"BTKUSA DUAL DIFFERENTIAL MOUNT G SERIES M240i\/M340i\/M440i\/A9X SUPRA","description":"\u003cp\u003e\u003cstrong\u003eFOR INTERNATIONAL ORDERS PLEASE EMAIL US BUILTTOKILL@YAHOO.COM OR DM US ON IG \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eALL HARDWARE FOR ASSEMBLY INCLUDED \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eALL COMPONENTS FROM THE BUSHING, BOLTS, TO THE FULL BILLET ASSEMBLY ARE PROUDLY MADE IN THE USA.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e MADE IN SAN CLEMENTE, CA 🇺🇸\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe BuiltToKillUSA Differential Dual Mount is designed to reinforce one of the G-series platform’s known weak points. Designed for the G-series M240i, M340i, M440i, and A90\/A91 Supra, unlike most dual diff mounts on the market this system utilizes a bushing rather than completely solid mounting to the chassis. We did this to prevent unwanted noise, vibration, and hardness. With the \u003cstrong\u003eBUILTTOKILLUSA \u003c\/strong\u003edual diff mount you get all the benefit without sacrificing comfort of your daily driver. Our dual diff mount keeps the differential stable under hard acceleration, aggressive launches, and spirited driving. This reduces flex and sharpens overall driveline response.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis system requires drilling a single mounting point into the subframe. To make installation straightforward, a properly sized drill bit is included in the kit. All supplied hardware is stainless steel, ensuring durability and resistance to corrosion over time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• Introduces an additional reinforced mounting point to better control differential movement under load\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• Enhances traction, throttle response, and overall drivetrain stability\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• Utilizes a threaded steel backing plate for a secure, reliable mount—no rivet nuts or compromise hardware\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• Complete hardware kit included, along with the required drill bit for installation\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• Installation requires drilling one precise hole in the subframe\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• Designed as a straightforward bolt-on solution with no need to remove factory mounting components\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWHAT IS A DUAL DIFF MOUNT AND HOW CAN IT BENEFIT MY BUILD?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e1. Improved load distribution\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• The mount ties both sides of the differential into the subframe instead of relying on a single ear or bushing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• This spreads torque load more evenly under hard acceleration, launches, and aggressive shifts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• That’s especially important on higher-torque cars where the diff wants to rotate upward.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e2. Reduced differential movement\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• Less movement = more consistent driveline geometry.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• This directly helps with:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e◦ Reduced wheel hop\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e◦ More predictable traction\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e◦ Less shock loading on axles and bushings\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e3. Structural rigidity\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• All US 6061 machined aluminum\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy We Use a Bushing Instead of a Solid Mount\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMost dual diff mounts on the market go fully solid but that isn’t always the best solution.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOur system uses a high-durometer 80A bushing to control differential movement without completely eliminating it. Under hard acceleration and clutch dumps, the bushing compresses slightly to absorb shock, then immediately stabilizes the drivetrain. This reduces unwanted flex while preventing harsh load spikes from being transferred directly into the subframe and mounting points.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe result:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMore controlled power delivery\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReduced drivetrain shock and stress\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImproved traction under load\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSignificantly less NVH compared to solid mounts\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eA full solid mount may eliminate all movement, but it also transfers every bit of force into the chassis. Our approach strikes the balance of delivering near-solid performance while protecting the car and keeping it streetable.\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Default Title","offer_id":45400353308716,"sku":null,"price":559.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/8104\/2732\/files\/IMG-3459.jpg?v=1774135329"},{"product_id":"btkusa-f9x-x3m-x4m-dual-diff-mount","title":"BTKUSA F9X X3M\/X4M Dual Diff Mount","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFOR INTERNATIONAL ORDERS PLEASE EMAIL US BUILTTOKILL@YAHOO.COM OR DM US ON IG\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eALL HARDWARE FOR ASSEMBLY INCLUDED \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003eMADE IN SAN CLEMENTE, CA 🇺🇸\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003eThe BuiltToKillUSA F9X X3M\/X4M Differential Mount is designed to eliminate one of the biggest weak points in the drivetrain by adding additional support and reducing excessive differential movement under hard acceleration, launches, and aggressive driving.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe factory setup allows the differential to twist and shift under load, which can lead to drivetrain slop, inconsistent power delivery, and added stress on the factory mounting points. Our upgraded mount helps stabilize the differential by distributing load more evenly and limiting unwanted movement without introducing the harshness of a fully solid setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBuilt using high-quality materials and engineered specifically for the F97 X3M and F98 X4M chassis, this mount improves drivetrain response, traction consistency, and overall stability while helping reduce stress on the factory diff bolt and mounting system — a known issue on high-power BMW platforms.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEvery component of the BuiltToKillUSA Differential Mount is proudly sourced and manufactured 100% in the USA. From machining to hardware and finishing, every part of this product is built domestically to ensure the highest level of quality, consistency, and durability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOne of the main things we had in mind when designing the mount was NVH. This is why we designed it to utilize a small 80A polyurethane bushing to help spread load more evenly. Across all our diff mounts we have had 0 NVH complaints so far. \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFeatures:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDesigned specifically for F97 X3M \u0026amp; F98 X4M\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e100% USA sourced and manufactured components\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReduces differential movement under load\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHelps reduce stress on the factory differential bolt\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImproves throttle response and drivetrain stability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBetter traction consistency during launches and shifting\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePerformance-focused bushing design without the excessive NVH unlike the leading solid mounted competitors\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCNC machined and built for long-term durability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDirect-fit installation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e80A POLY BUSHING DESIGN \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eWhether your X3M\/X4M is stock power or a fully built high-horsepower setup, the BuiltToKillUSA Differential Mount is designed to provide the support and confidence the factory system lacks.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePROFESSIONAL INSTALLATION IS RECOMMENDED AS A RIVET TOOL IS REQUIRED. VERY INEXPENSIVE TOOL THAT CAN BE PURCHASED ON AMAZON OR MOST HARDWARE STORES IF DOING A DIY INSTALL\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eALL COMPONENTS FROM THE BUSHING, BOLTS, TO THE FULL BILLET ASSEMBLY ARE PROUDLY MADE IN THE USA.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Default Title","offer_id":45525268758572,"sku":"BTK-USA-F9X","price":559.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/8104\/2732\/files\/IMG-5079.jpg?v=1778212916"}],"url":"https:\/\/builttokillusa.com\/collections\/g8x-s58.oembed","provider":"BuiltToKillUSA","version":"1.0","type":"link"}