Dynamite Friction 633-31046L Disc Brake Rotor - Front Left

Overview of the DFC Brake Rotor - Drilled and Slotted - Black

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Black (part number 633-31046L) is engineered for BMW models including the 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4. This vented disc brake rotor features a directional, slotted, and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4
• Part Number: 633-31046L
• Disc diameter: 300 mm with 5 bolt holes (14.6 mm diameter)
• Vented rotor design for improved cooling
• Directional slotted and drilled surface for enhanced brake pad contact and debris removal
• Zinc black hat finish with rust-resistant coating
• Nominal thickness of 22 mm and discard thickness of 20.4 mm
• Bolt circle diameter and stud/lug hole circle diameter of 120 mm

Detailed Product Description

The DFC Brake Rotor - Drilled and Slotted - Black from Dynamite Friction is a vented disc brake rotor designed to meet the braking demands of various BMW models such as the 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4. The rotor measures 300 mm in outside diameter and features a nominal thickness of 22 mm, with a discard thickness of 20.4 mm to ensure safe replacement intervals. Its directional surface is both drilled and slotted, which helps to reduce brake fade by improving heat dissipation and allowing gases and debris to escape during braking. The rotor’s hat is finished in zinc black, providing corrosion resistance along with a rust-resistant coating on the entire rotor surface. The 5-bolt hole pattern with a 14.6 mm diameter and a 120 mm bolt circle diameter ensures precise fitment and secure mounting.

DFC Brake Rotor - Drilled and Slotted - Black Product Line

The DFC Brake Rotor - Drilled and Slotted - Black line by Dynamite Friction focuses on rotors that combine drilled holes and slots on a directional surface to optimize braking performance and rotor longevity. This product line is designed to provide consistent braking under demanding conditions by enhancing heat dissipation and maintaining pad contact. The zinc black hat finish and rust-resistant coating contribute to durability and corrosion protection, making it suitable for BMW vehicles requiring reliable replacement rotors.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 3 Series and Z models
• Improves heat dissipation to reduce brake fade during aggressive driving
• Helps prevent brake pad glazing by maintaining a clean rotor surface
• Addresses rotor corrosion issues with rust-resistant coating
• Restores braking performance and pedal feel for safer driving

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (20.4 mm) before installation
• Clean rotor surface with brake cleaner to remove any protective oils
• Torque lug nuts to manufacturer specifications using a star pattern
• Inspect brake pads and replace if worn to ensure optimal rotor performance
• Check for proper fitment on BMW 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4 models

Quality Assurance and Warranty

Dynamite Friction manufactures the DFC Brake Rotor - Drilled and Slotted - Black to meet or exceed OEM specifications for fit, form, and function. The rotor includes a rust-resistant coating and zinc black hat finish to extend service life. Warranty details should be confirmed with the distributor or retailer, as coverage may vary.