Raybestos 681938PER Disc Brake Rotor - Rear

Overview of Raybestos Disc Brake Rotor 681938PER

The Raybestos Specialty - Street Performance; S-Groove Technology disc brake rotor 681938PER is engineered for Ford Mustang models requiring reliable braking performance. This solid rotor is designed to meet specific thickness and diameter specifications to ensure proper fit and function.

• Compatible with Ford Mustang vehicles
• Part number: 681938PER
• Solid disc brake rotor design
• Nominal thickness: 0.445 inches (11.3 mm)
• Discard thickness: 0.390 inches (9.9 mm)
• Outside diameter: 12.598 inches (320 mm)
• Inside diameter: 9.252 inches (235 mm)
• Mounting bolt hole quantity: 5
• Mounting bolt hole circle diameter: 4.5 inches (114.3 mm)
• Center hole diameter: 2.795 inches (71 mm)
• Overall height: 1.63 inches (41.4 mm)

Detailed Product Description

This Raybestos disc brake rotor 681938PER is a solid rotor designed for conventional mounting on Ford Mustang models. The rotor features a nominal thickness of 0.445 inches (11.3 mm) and a discard thickness of 0.390 inches (9.9 mm), ensuring it meets strict wear limits for safe operation. With an outside diameter of 12.598 inches (320 mm) and an inside diameter of 9.252 inches (235 mm), this rotor fits precisely within the brake assembly. The mounting bolt hole pattern includes five holes with a 4.5-inch (114.3 mm) bolt circle diameter, matching the Mustang's factory specifications. The center hole diameter of 2.795 inches (71 mm) and overall height of 1.63 inches (41.4 mm) complete the dimensional profile necessary for proper installation and performance.

The rotor is part of the Raybestos Specialty - Street Performance; S-Groove Technology product line, which focuses on street performance applications. This line incorporates advanced S-Groove technology designed to improve brake pad contact and reduce noise, vibration, and harshness during braking. This makes the 681938PER rotor suitable for Mustang owners seeking a balance between everyday drivability and enhanced braking response.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Ford Mustang models
• Addresses brake pulsation caused by uneven rotor surfaces
• Resolves excessive brake noise and vibration issues
• Restores proper rotor thickness for safe braking performance
• Compatible with conventional brake systems requiring solid rotors

Installation Notes and Tips

• Verify rotor dimensions and bolt pattern match your Mustang before installation
• Inspect brake pads and hardware for wear and replace as needed
• Clean rotor surface with brake cleaner to remove any protective coatings
• Torque mounting bolts to manufacturer specifications to avoid rotor warping
• Perform a bed-in procedure after installation to optimize braking performance

Quality Assurance and Warranty

Raybestos disc brake rotors, including part number 681938PER, are manufactured to meet or exceed OEM standards for durability and performance. The Specialty - Street Performance; S-Groove Technology line undergoes rigorous quality control to ensure consistent thickness, balance, and material integrity. While specific warranty details may vary, Raybestos typically offers limited warranties covering defects in materials and workmanship. Always consult product documentation or authorized sources for exact warranty terms.