{"product_id":"ford-explorer-2020-2023-street-challenge-rear-rfk641-02","title":"Ford Explorer 2020-2023 Street Challenge Rear Brake System","description":"\u003ch4\u003eUpgraded Rear Rotor Size for Serious Explorer ST Performance\u003c\/h4\u003e\n\u003cp\u003eThe RFK.641.02 Rotora Street Challenge Rear Brake System steps up rear braking on the 2020-2023 Ford Explorer ST with a 4-piston RF404 forged caliper and a larger 380x32mm 2-piece floating rotor. This upgraded rotor size gives high-output front kits a rear system that can keep pace under hard braking.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e4-piston RF404 forged aluminum caliper for balanced rear clamping force\u003c\/li\u003e\n\u003cli\u003e380x32mm 2-piece floating rotor for increased swept area over the base rear kit\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on fitment for the rear axle, no permanent modification required\u003c\/li\u003e\n\u003cli\u003eAvailable in 10 caliper finishes including Natural Anodize (Zinc)\u003c\/li\u003e\n\u003cli\u003eSlotted or Drilled rotor face options to match braking preference\u003c\/li\u003e\n\u003cli\u003eStainless steel braided brake lines included for firmer pedal feel\u003c\/li\u003e\n\u003cli\u003ePerformance brake pads matched to the RF404 caliper included\u003c\/li\u003e\n\u003cli\u003eDesigned to pair with high-output front Street Challenge brake systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eTrim\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2020-2023\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eExplorer\u003c\/td\u003e\n\u003ctd\u003eST\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPN\u003c\/td\u003e\n\u003ctd\u003eRFK.641.02\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCaliper Type\u003c\/td\u003e\n\u003ctd\u003e4-piston RF404 forged aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRotor Size\u003c\/td\u003e\n\u003ctd\u003e380x32mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRotor Type\u003c\/td\u003e\n\u003ctd\u003e2-piece floating disc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePosition\u003c\/td\u003e\n\u003ctd\u003eRear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish Options\u003c\/td\u003e\n\u003ctd\u003e10 caliper colors, Slotted or Drilled rotor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003e2020-2023 Ford Explorer ST\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eManufacturer limited warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e2x RF404 4-piston forged aluminum calipers\u003c\/li\u003e\n\u003cli\u003e2x 380x32mm 2-piece floating rotors\u003c\/li\u003e\n\u003cli\u003eStainless steel braided brake lines\u003c\/li\u003e\n\u003cli\u003eMounting brackets and hardware\u003c\/li\u003e\n\u003cli\u003ePerformance brake pads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAbout Rotora\u003c\/h4\u003e\n\u003cp\u003eRotora designs and manufactures big brake kits for street and track enthusiasts, engineering forged aluminum calipers and 2-piece rotors that deliver consistent stopping power under demanding conditions.\u003c\/p\u003e\n\u003ch4\u003eRelated Parts on Our Site\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/ford-explorer-2020-2023-street-challenge-front-rfk640-02\" target=\"_blank\" rel=\"noopener\"\u003eFord Explorer 2020-2023 Street Challenge Front Brake System (RFK.640.02)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFAQ\u003c\/h4\u003e\n\u003cstrong\u003eWhat is the RFK.641.02?\u003c\/strong\u003e\n\u003cp\u003eThe RFK.641.02 is a Rotora Street Challenge rear brake system for the 2020-2023 Ford Explorer ST, featuring a 4-piston RF404 forged aluminum caliper and a 380x32mm 2-piece floating rotor.\u003c\/p\u003e\n\u003cstrong\u003eHow does this kit differ from the RFK.641.01?\u003c\/strong\u003e\n\u003cp\u003eThe RFK.641.02 uses a larger 380x32mm rotor compared to the 355x29mm rotor on the RFK.641.01, giving it more swept area for pairing with higher-output front kits.\u003c\/p\u003e\n\u003cstrong\u003eWhat caliper colors are available?\u003c\/strong\u003e\n\u003cp\u003eThe RFK.641.02 is available in 10 caliper finishes, including Red, Dark Metallic Blue, Silver, Gloss Black, Green, Orange, Light Metallic Blue, White, Black Hard-Anodize Finish, Yellow, and Natural Anodize (Zinc).\u003c\/p\u003e\n\u003cstrong\u003eWhat is the difference between Slotted and Drilled rotors?\u003c\/strong\u003e\n\u003cp\u003eSlotted rotors clear gas and debris from the pad surface, while Drilled rotors add additional cooling channels through the rotor face. Both are available for this kit.\u003c\/p\u003e\n\u003cstrong\u003eDoes this kit include brake pads?\u003c\/strong\u003e\n\u003cp\u003eYes, performance brake pads matched to the RF404 caliper are included with this kit.\u003c\/p\u003e\n\u003cstrong\u003eIs this a front or rear brake system?\u003c\/strong\u003e\n\u003cp\u003eThe RFK.641.02 is a rear brake system. Matching front systems are available separately for the Explorer ST.\u003c\/p\u003e\n\u003cstrong\u003eWill I need to modify my Explorer to install this kit?\u003c\/strong\u003e\n\u003cp\u003eNo, this kit is designed for direct bolt-on installation on the rear axle without permanent modification.\u003c\/p\u003e\n\u003cstrong\u003eWhat is the rotor construction on this kit?\u003c\/strong\u003e\n\u003cp\u003eThe RFK.641.02 uses a 380x32mm 2-piece floating rotor design for reduced rotational weight and improved heat dissipation.\u003c\/p\u003e\n\u003ch4\u003eInstall Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eLift the vehicle and secure it on jack stands, then remove the rear wheels.\u003c\/li\u003e\n\u003cli\u003eRemove the factory rear calipers and disconnect the brake lines.\u003c\/li\u003e\n\u003cli\u003eRemove the factory rear rotors and brake hardware.\u003c\/li\u003e\n\u003cli\u003eInstall the new 380x32mm 2-piece floating rotors onto the rear hubs.\u003c\/li\u003e\n\u003cli\u003eMount the RF404 4-piston calipers using the supplied brackets and hardware.\u003c\/li\u003e\n\u003cli\u003eInstall the included performance brake pads into the calipers.\u003c\/li\u003e\n\u003cli\u003eConnect the new stainless steel braided brake lines and torque all fittings.\u003c\/li\u003e\n\u003cli\u003eBleed the brake system thoroughly and check for leaks.\u003c\/li\u003e\n\u003cli\u003eReinstall the wheels, torque to spec, and bed in the new brakes before hard driving.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eWARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"Rotora","offers":[{"title":"Slotted \/ Natural-Anodize Finish","offer_id":40645328568399,"sku":"RFK.641.02-Z-S","price":4195.0,"currency_code":"USD","in_stock":true},{"title":"Slotted \/ Red","offer_id":40645327880271,"sku":"RFK.641.02-A-S","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Slotted \/ Orange","offer_id":40645328240719,"sku":"RFK.641.02-K-S","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Slotted \/ Yellow","offer_id":40645328502863,"sku":"RFK.641.02-Y-S","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Slotted \/ Green","offer_id":40645328175183,"sku":"RFK.641.02-H-S","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Slotted \/ Light Metallic Blue","offer_id":40645328306255,"sku":"RFK.641.02-M-S","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Slotted \/ Dark Metallic Blue","offer_id":40645327945807,"sku":"RFK.641.02-B-S","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Slotted \/ Silver","offer_id":40645328044111,"sku":"RFK.641.02-F-S","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Slotted \/ Gloss Black","offer_id":40645328109647,"sku":"RFK.641.02-G-S","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Slotted \/ White","offer_id":40645328371791,"sku":"RFK.641.02-W-S","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Drilled \/ Natural-Anodize Finish","offer_id":40645328601167,"sku":"RFK.641.02-Z-X","price":4195.0,"currency_code":"USD","in_stock":true},{"title":"Drilled \/ Red","offer_id":40645327913039,"sku":"RFK.641.02-A-X","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Drilled \/ Orange","offer_id":40645328273487,"sku":"RFK.641.02-K-X","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Drilled \/ Yellow","offer_id":40645328535631,"sku":"RFK.641.02-Y-X","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Drilled \/ Green","offer_id":40645328207951,"sku":"RFK.641.02-H-X","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Drilled \/ Light Metallic Blue","offer_id":40645328339023,"sku":"RFK.641.02-M-X","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Drilled \/ Dark Metallic Blue","offer_id":40645328011343,"sku":"RFK.641.02-B-X","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Drilled \/ Silver","offer_id":40645328076879,"sku":"RFK.641.02-F-X","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Drilled \/ Gloss Black","offer_id":40645328142415,"sku":"RFK.641.02-G-X","price":3995.0,"currency_code":"USD","in_stock":true},{"title":"Drilled \/ White","offer_id":40645328404559,"sku":"RFK.641.02-W-X","price":3995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/rotora-trx-rear-street-challenge-brake-system-zinc_098d4041-40f7-4965-a477-e1454a3377a9.webp?v=1784840504","url":"https:\/\/www.blackopsautoworks.com\/products\/ford-explorer-2020-2023-street-challenge-rear-rfk641-02","provider":"Black Ops Auto Works","version":"1.0","type":"link"}