{"product_id":"vtt-f9x-m5-m8-ultimate-lightweight-rear-brake-kit","title":"VTT F9X M5\/M8 Ultimate Lightweight Rear Brake Kit","description":"\u003ch1\u003eVTT F9X M5\/M8 Ultimate Lightweight Rear Brake Kit\u003c\/h1\u003e\n\u003ch2\u003eF90 M5 \/ F91 M8 \/ F92 M8 \/ F93 M8\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e36.8 lbs off the rear. 18.4 lbs saved per side. 17″ wheel fitment. OEM BMW calipers. Factory electronic parking brake retained. 12.15″ two-piece vented rotors.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe VTT F9X M5\/M8 Ultimate Lightweight Rear Brake Kit was engineered to remove a massive amount of unsprung and rotating mass while preserving the factory functionality that makes the car usable on the street.\u003c\/p\u003e\n\u003cp\u003eDon’t confuse this with a stripped-down, single-purpose drag brake conversion.\u003c\/p\u003e\n\u003cp\u003eThe rear of the F9X presents a different engineering challenge from the front. The factory rear calipers incorporate the electronic parking brake, making it difficult to reduce brake weight without sacrificing factory functionality.\u003c\/p\u003e\n\u003cp\u003eThe VTT F9X Ultimate Lightweight Rear Brake Kit takes a different approach.\u003c\/p\u003e\n\u003cp\u003eUsing 12.15″ two-piece vented rotors with lightweight billet aluminum hats, F9X-specific VTT mounting components, and OEM BMW rear calipers, we’ve removed \u003cstrong\u003e36.8 lbs from the rear axle\u003c\/strong\u003e while retaining the factory electronic parking brake.\u003c\/p\u003e\n\u003cp\u003eThe complete VTT rear brake assembly weighs just \u003cstrong\u003e21.3 lbs per side\u003c\/strong\u003e, compared with \u003cstrong\u003e39.7 lbs per side\u003c\/strong\u003e for the factory assembly.\u003c\/p\u003e\n\u003cp\u003eThat is an \u003cstrong\u003e18.4-lb reduction at each rear corner\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLess brake weight.\u003c\/strong\u003e\u003cbr\u003e\n\u003cstrong\u003eLess rotating mass.\u003c\/strong\u003e\u003cbr\u003e\n\u003cstrong\u003eSmaller and lighter wheel options.\u003c\/strong\u003e\u003cbr\u003e\n\u003cstrong\u003eMore tire options.\u003c\/strong\u003e\u003cbr\u003e\n\u003cstrong\u003eMore traction potential.\u003c\/strong\u003e\u003cbr\u003e\n\u003cstrong\u003eFactory electronic parking brake retained.\u003c\/strong\u003e\u003cbr\u003e\n\u003cstrong\u003eReal braking capability.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/p\u003e\n\u003ch1\u003e36.8 LBS OFF THE REAR\u003c\/h1\u003e\n\u003cp\u003eThe factory F9X rear brake assembly weighs approximately \u003cstrong\u003e39.7 lbs per side\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe complete VTT rear brake assembly weighs just \u003cstrong\u003e21.3 lbs per side\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThat means the VTT conversion removes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e18.4 lbs per rear corner\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e36.8 lbs across the rear axle\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis weight is removed directly from the rear suspension and brake assemblies.\u003c\/p\u003e\n\u003cp\u003eRemoving 36.8 lbs from the rear of any performance vehicle is significant.\u003c\/p\u003e\n\u003cp\u003eRemoving 36.8 lbs of unsprung and rotating brake mass is even better.\u003c\/p\u003e\n\u003cp\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/p\u003e\n\u003ch1\u003e18.4 LBS SAVED PER SIDE\u003c\/h1\u003e\n\u003cp\u003eThe weight difference at each rear corner is substantial:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eFactory rear brake assembly: 39.7 lbs\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eVTT rear brake assembly: 21.3 lbs\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eWeight reduction per side: 18.4 lbs\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAcross both rear corners, that becomes a total reduction of \u003cstrong\u003e36.8 lbs\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis reduction is achieved without eliminating the OEM BMW caliper or factory electronic parking-brake system.\u003c\/p\u003e\n\u003cp\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/p\u003e\n\u003ch1\u003eTWO-PIECE ROTORS REDUCE ROTATING MASS\u003c\/h1\u003e\n\u003cp\u003eThe VTT system replaces the heavy factory rear rotor with a \u003cstrong\u003e12.15″ two-piece vented rotor\u003c\/strong\u003e featuring a lightweight billet aluminum hat.\u003c\/p\u003e\n\u003cp\u003eThe two-piece rotor design removes weight from the rotating brake assembly while retaining the vented construction needed for a heavy, extremely fast street and drag vehicle.\u003c\/p\u003e\n\u003cp\u003eBecause the rotor rotates with the wheel, weight removed here reduces both unsprung mass and rotating mass.\u003c\/p\u003e\n\u003cp\u003eRotating mass must be accelerated in two ways:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eForward with the vehicle\u003c\/li\u003e\n\u003cli\u003eRotationally around the axle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eReducing rotational inertia means less energy is required to accelerate the brake, wheel, and tire assembly.\u003c\/p\u003e\n\u003cp\u003eFor a vehicle being optimized for acceleration, response, and elapsed-time reduction, this is exactly where you want to remove weight.\u003c\/p\u003e\n\u003cp\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/p\u003e\n\u003ch1\u003eRETAINS THE OEM BMW REAR CALIPER\u003c\/h1\u003e\n\u003cp\u003eThe rear of the F9X presents a unique challenge because the caliper assembly incorporates the electronic parking-brake system.\u003c\/p\u003e\n\u003cp\u003eMany lightweight rear brake conversions eliminate factory functionality in pursuit of the lowest possible weight.\u003c\/p\u003e\n\u003cp\u003eWe didn’t want to do that.\u003c\/p\u003e\n\u003cp\u003eInstead, VTT designed the rear conversion around the \u003cstrong\u003eOEM BMW rear caliper\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThat means the conversion retains:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFactory electronic parking-brake operation\u003c\/li\u003e\n\u003cli\u003eOEM BMW rear caliper function\u003c\/li\u003e\n\u003cli\u003eOEM serviceability\u003c\/li\u003e\n\u003cli\u003eStreet-friendly convenience\u003c\/li\u003e\n\u003cli\u003eBMW system integration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou get the weight reduction and wheel clearance of a purpose-built performance brake package without giving up the factory electronic parking brake.\u003c\/p\u003e\n\u003cp\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/p\u003e\n\u003ch1\u003e17″ REAR WHEEL FITMENT CHANGES EVERYTHING\u003c\/h1\u003e\n\u003cp\u003eFor serious F9X performance builds, this may be one of the biggest advantages of the entire conversion.\u003c\/p\u003e\n\u003cp\u003eThe VTT F9X rear brake kit allows fitment of \u003cstrong\u003e17″ rear wheels\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe massive factory brake package severely limits wheel diameter and, as a result, limits the wheel and tire combinations available for the car.\u003c\/p\u003e\n\u003cp\u003eThe VTT system removes that limitation.\u003c\/p\u003e\n\u003cp\u003eDropping down to a 17″ rear wheel opens up a huge range of performance-oriented combinations, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLightweight drag wheels\u003c\/li\u003e\n\u003cli\u003eDrag radials\u003c\/li\u003e\n\u003cli\u003eBias-ply tires\u003c\/li\u003e\n\u003cli\u003eFull slicks\u003c\/li\u003e\n\u003cli\u003eTaller-sidewall tire combinations\u003c\/li\u003e\n\u003cli\u003ePurpose-built drag racing wheel and tire packages\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis gives F9X owners far greater freedom to optimize the car around weight, traction, tire construction, sidewall, and overall drag-strip performance.\u003c\/p\u003e\n\u003cp\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/p\u003e\n\u003ch1\u003eTHE WEIGHT SAVINGS CAN GO FAR BEYOND 36.8 LBS\u003c\/h1\u003e\n\u003cp\u003eThe 36.8-lb reduction comes from the rear brake conversion alone.\u003c\/p\u003e\n\u003cp\u003eOnce the factory brakes are no longer dictating wheel diameter, you can take the weight reduction significantly further.\u003c\/p\u003e\n\u003cp\u003eReplacing the large, heavy factory rear wheel and tire combination with a lightweight 17″ drag setup can remove even more rotating and unsprung mass from the rear axle.\u003c\/p\u003e\n\u003cp\u003eThe VTT rear brake kit doesn’t simply save 36.8 lbs.\u003c\/p\u003e\n\u003cp\u003eIt unlocks the ability to remove additional rotating mass through your wheel and tire selection while dramatically expanding your available tire options.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMore sidewall.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMore tire choices.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMore traction options.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLess rotating mass.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNone of it is possible if the factory brakes won’t fit inside the wheel.\u003c\/p\u003e\n\u003cp\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/p\u003e\n\u003ch1\u003eNOT A SINGLE-PASS DRAG BRAKE KIT\u003c\/h1\u003e\n\u003cp\u003eWeight reduction is easy if you’re willing to sacrifice braking capability and factory functionality.\u003c\/p\u003e\n\u003cp\u003eWe weren’t.\u003c\/p\u003e\n\u003cp\u003eF9X M5 and M8 models are heavy vehicles, and modified examples are capable of extraordinary horsepower, acceleration, and trap speeds.\u003c\/p\u003e\n\u003cp\u003eThat’s why the VTT rear kit uses substantial \u003cstrong\u003e12.15″ vented rotors\u003c\/strong\u003e and OEM BMW rear calipers rather than a minimal non-vented rotor and stripped-down caliper arrangement designed primarily around making a single pass.\u003c\/p\u003e\n\u003cp\u003eThe goal was straightforward:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRemove as much weight as possible without giving up the braking system and factory functionality required for a fast, heavy car.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe system is suitable for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStreet driving\u003c\/li\u003e\n\u003cli\u003eDrag racing\u003c\/li\u003e\n\u003cli\u003eHigh-performance street use\u003c\/li\u003e\n\u003cli\u003eModerate track use when properly configured and operated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou get the wheel clearance and weight reduction normally associated with a drag brake conversion while retaining a substantial vented rotor, OEM BMW calipers, and the factory electronic parking brake.\u003c\/p\u003e\n\u003cp\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/p\u003e\n\u003ch1\u003eCOMPLETE BOLT-ON SYSTEM\u003c\/h1\u003e\n\u003cp\u003eThe VTT F9X Ultimate Lightweight Rear Brake Kit is a complete bolt-on conversion designed specifically for the F9X platform.\u003c\/p\u003e\n\u003cp\u003eThe kit includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVTT 12.15″ two-piece vented rear rotors\u003c\/li\u003e\n\u003cli\u003eVTT CNC-machined billet aluminum rotor hats\u003c\/li\u003e\n\u003cli\u003eOEM BMW rear calipers\u003c\/li\u003e\n\u003cli\u003eFactory electronic parking-brake actuators\u003c\/li\u003e\n\u003cli\u003eVTT CNC-machined F9X-specific caliper brackets\u003c\/li\u003e\n\u003cli\u003eRequired mounting hardware\u003c\/li\u003e\n\u003cli\u003eWheel spacers shown with the package, where applicable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/p\u003e\n\u003ch1\u003eFITMENT\u003c\/h1\u003e\n\u003cp\u003eDesigned specifically for the BMW F9X M5\/M8 platform:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eF90 M5\u003c\/li\u003e\n\u003cli\u003eF91 M8\u003c\/li\u003e\n\u003cli\u003eF92 M8\u003c\/li\u003e\n\u003cli\u003eF93 M8\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWheel clearance varies according to wheel design, barrel profile, width, and offset.\u003c\/p\u003e\n\u003cp\u003eAlways confirm wheel fitment before purchasing wheels.\u003c\/p\u003e\n\u003cp\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/p\u003e\n\u003ch1\u003eTHE BOTTOM LINE\u003c\/h1\u003e\n\u003cp\u003eThe VTT F9X Ultimate Lightweight Rear Brake Kit isn’t simply about installing smaller brakes.\u003c\/p\u003e\n\u003cp\u003eIt’s about removing one of the biggest limitations of the factory F9X rear brake and wheel package.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e36.8 lbs of rear brake-system weight removed\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e18.4 lbs saved per rear corner\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eVTT assembly weighs 21.3 lbs per side\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFactory assembly weighs 39.7 lbs per side\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e12.15″ two-piece vented rotors\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eLightweight billet aluminum rotor hats\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eReduced rotating mass\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOEM BMW rear calipers retained\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFactory electronic parking brake retained\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e17″ rear wheel fitment\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAccess to lightweight drag wheels, drag radials, and slicks\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAdditional rotating-mass reduction potential through wheel and tire selection\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eStreet and drag capability\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDrop the weight. Open up your wheel and tire options. Add traction. Keep the factory parking brake. Keep real braking capability.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/p\u003e\n\u003ch1\u003eIMPORTANT DISCLAIMER\u003c\/h1\u003e\n\u003cp\u003eVTT HD brake kits are designed for street use and drag racing, with moderate track use when properly configured with the appropriate pad compound and operated within the capabilities of the system.\u003c\/p\u003e\n\u003cp\u003eAlways operate your vehicle within your abilities and the capabilities of the braking system.\u003c\/p\u003e\n\u003cp\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/p\u003e\n\u003ch1\u003eBEDDING PROCEDURE - CRITICAL\u003c\/h1\u003e\n\u003cp\u003eBrake pads must be properly bedded to achieve full braking performance.\u003c\/p\u003e\n\u003cp\u003eFailure to properly bed the pads can result in dramatically reduced braking effectiveness and pad glazing.\u003c\/p\u003e\n\u003cp\u003eIf glazing occurs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRemove the affected components as necessary.\u003c\/li\u003e\n\u003cli\u003eProperly prepare or sand the pad friction surface.\u003c\/li\u003e\n\u003cli\u003eReinstall the components.\u003c\/li\u003e\n\u003cli\u003eRepeat the complete bedding procedure before demanding maximum braking performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDo not judge the braking capability of the system before the pads have been properly bedded.\u003c\/p\u003e\n\u003cp\u003eComplete bedding instructions are included with every VTT brake kit.\u003c\/p\u003e","brand":"Vargas Turbo Technologies","offers":[{"title":"Default Title","offer_id":47878124634268,"sku":"VTT-BMW-F90-REAR-BRAKE","price":1989.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0473\/3206\/5436\/files\/IMG_2792_7d08e20c-f42d-4463-9ee8-6ffde1e75f70.jpg?v=1792262722","url":"https:\/\/daroracing.com\/products\/vtt-f9x-m5-m8-ultimate-lightweight-rear-brake-kit","provider":"Daro Racing","version":"1.0","type":"link"}