Dynamite Friction 631-31038R Disc Brake Rotor - Front Right

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31038R) is engineered for reliable braking performance on BMW 318ti and Z3 models. This solid disc brake rotor features a directional, slotted and drilled surface designed to enhance heat dissipation and maintain consistent stopping power.

• Compatible with BMW 318ti and Z3 vehicles
• Solid rotor design with drilled and slotted surface
• Nominal thickness of 12 mm and discard thickness of 10.4 mm
• Directional brake surface for optimized performance
• Zinc silver hat finish with rust-resistant coating
• 5 bolt holes with 15 mm diameter and 120 mm bolt circle diameter
• Overall diameter of 286 mm and height of 51.7 mm

Details on the DFC Brake Rotor - Drilled and Slotted - Silver Line

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that combine drilled holes and slots to improve brake pad bite and reduce heat buildup. This product line is designed to provide enhanced braking consistency and durability, particularly for vehicles like the BMW 318ti and Z3 that demand precise stopping power. The silver zinc coating on the rotor hat offers additional corrosion resistance, extending the rotor's service life.

Technical Specifications and Features

This disc brake rotor is a solid type with a plain disc finish and a zinc silver hat finish that includes a rust-resistant coating. It features a directional surface type with both drilled holes and slots to help evacuate gases and debris from the braking surface. The rotor measures 286 mm in outside diameter and 51.7 mm in overall height, with a nominal thickness of 12 mm and a discard thickness of 10.4 mm. The bolt hole diameter and stud/lug hole diameter are both 15 mm, with a total of 5 holes arranged on a 120 mm bolt circle diameter. The center hole diameter is 79 mm, ensuring proper fitment on compatible BMW models.

Applications and Problem Solving

• Replacement rotor for worn or warped brake rotors on BMW 318ti and Z3
• Improves heat dissipation to reduce brake fade during aggressive driving
• Helps maintain consistent braking performance under heavy load or high-speed conditions
• Addresses rotor corrosion issues with rust-resistant coating
• Enhances brake pad bite and reduces brake dust buildup with drilled and slotted design

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 10.4 mm before installation. The directional surface requires correct orientation during mounting to maintain optimal braking performance. Verify that the 5 bolt holes and 15 mm diameter match your vehicle’s hub specifications. Clean the rotor surface of any protective coatings before installation to prevent brake pad contamination.

Quality Assurance

Dynamite Friction manufactures this rotor to meet OEM specifications for fit and function on BMW 318ti and Z3 models. The rust-resistant zinc silver coating helps extend rotor life by protecting against corrosion. While no specific warranty information is provided, the rotor is designed for durability and consistent braking performance under normal operating conditions.