{"product_id":"raybestos-66840-disc-brake-rotor","title":"Raybestos 66840 Disc Brake Rotor - Rear","description":"\u003ch2\u003eRaybestos Specialty - Street Performance Disc Brake Rotor Overview\u003c\/h2\u003e\u003cp\u003eThe Raybestos Specialty - Street Performance disc brake rotor 66840 is engineered for reliable braking performance on select Ford, Jaguar, and Lincoln vehicles. Designed as a vented, conventional rotor, it offers consistent heat dissipation and durability for street driving conditions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVented disc brake rotor for improved cooling\u003c\/li\u003e\n\u003cli\u003eOverall height: 1.275 inches (32.400 mm)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 11.335 inches (287.900 mm)\u003c\/li\u003e\n\u003cli\u003eNominal thickness: 0.790 inches (20.050 mm)\u003c\/li\u003e\n\u003cli\u003eDiscard thickness: 0.728 inches (18.500 mm)\u003c\/li\u003e\n\u003cli\u003eMounting bolt hole quantity: 5 with 4.250 inch (107.950 mm) bolt circle diameter\u003c\/li\u003e\n\u003cli\u003eCenter hole diameter: 2.538 inches (64.450 mm)\u003c\/li\u003e\n\u003cli\u003eCompatible with 5 stud\/lug hole configurations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Specifications\u003c\/h2\u003e\u003cp\u003eThis Raybestos disc brake rotor, part number 66840, features a vented design that enhances heat dissipation during braking, reducing the risk of brake fade under normal street performance conditions. The rotor's nominal thickness of 0.790 inches ensures structural integrity, while the discard thickness of 0.728 inches indicates the minimum safe thickness before replacement is necessary. With an overall height of 1.275 inches and an outside diameter of 11.335 inches, this rotor fits vehicles requiring these precise dimensions. The 5 mounting bolt holes arranged on a 4.250 inch bolt circle diameter provide secure attachment, and the 2.538 inch center hole diameter ensures proper hub fitment.\u003c\/p\u003e\u003ch2\u003eSpecialty - Street Performance Product Line\u003c\/h2\u003e\u003cp\u003eThe Raybestos Specialty - Street Performance line focuses on delivering rotors designed for street-driven vehicles that demand dependable braking without the need for racing-grade components. This product line balances performance and durability, making it suitable for vehicles like the Ford Thunderbird, Jaguar XJ8, and Lincoln LS, where consistent braking response is essential for everyday driving.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFord Thunderbird\u003c\/li\u003e\n\u003cli\u003eJaguar S-Type, XJ8, XJR\u003c\/li\u003e\n\u003cli\u003eLincoln LS, Vanden Plas\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePart number 66840 is specifically designed to meet the braking requirements of these models, ensuring proper fit and function.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Rotor\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake rotor warping due to heat buildup\u003c\/li\u003e\n\u003cli\u003eReduced braking efficiency from worn or thin rotors\u003c\/li\u003e\n\u003cli\u003eBrake noise caused by uneven rotor surfaces\u003c\/li\u003e\n\u003cli\u003eVibration or pulsation during braking\u003c\/li\u003e\n\u003cli\u003eCorrosion and surface damage affecting rotor performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Raybestos 66840 rotor, ensure the mounting surface is clean and free of debris to prevent uneven rotor seating. Verify the rotor thickness before installation to confirm it meets or exceeds the discard thickness specification of 0.728 inches. Use proper torque specifications on the 5 mounting bolts to avoid rotor distortion. It is recommended to replace brake pads simultaneously to maintain optimal braking performance.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eRaybestos manufactures this rotor to meet or exceed OEM specifications for fit, form, and function. The Specialty - Street Performance rotors undergo rigorous quality control to ensure durability and consistent braking performance. Warranty details are provided by Raybestos and typically cover defects in materials and workmanship under normal use conditions.\u003c\/p\u003e","brand":"Raybestos","offers":[{"title":"Default Title","offer_id":44446492754101,"sku":"BDBL-66840","price":79.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RS_66840_Fro.jpg?v=1774636590","url":"https:\/\/www.partcatalog.com\/products\/raybestos-66840-disc-brake-rotor","provider":"PartCatalog","version":"1.0","type":"link"}