Dynamite Friction 633-31114L Disc Brake Rotor - Rear Left

Overview of DFC Brake Rotor - Drilled and Slotted - Black

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Black (part number 633-31114L) is engineered for BMW models including the 230i, 328i xDrive, 335i, 440i Gran Coupe, and others. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Part Number: 633-31114L
• Compatible with multiple BMW models such as 230i, 328i, 335i, 440i, and M240i variants
• Vented disc brake rotor with directional drilled and slotted surface
• Nominal thickness: 24 mm; discard thickness: 22.4 mm
• Outside diameter: 345 mm; overall height: 66.2 mm
• Hat finish with zinc black coating and rust-resistant surface
• 5 bolt holes with 16.6 mm diameter and 120 mm bolt circle diameter

Detailed Product Features and Specifications

This DFC Brake Rotor - Drilled and Slotted - Black is designed with a vented rotor type to improve heat dissipation during braking, reducing the risk of brake fade. The rotor’s surface is both drilled and slotted, which helps to evacuate gases, dust, and water, maintaining consistent brake pad contact and performance. The directional brake surface ensures optimal airflow and cooling when installed correctly.

The rotor measures 345 mm in outside diameter and 66.2 mm in overall height, with a nominal thickness of 24 mm and a discard thickness of 22.4 mm, indicating when replacement is necessary. The hat section features a zinc black finish that provides corrosion resistance, complemented by an overall rust-resistant coating to extend rotor life.

Mounting is facilitated by five bolt holes, each 16.6 mm in diameter, arranged on a 120 mm bolt circle diameter, matching the stud/lug hole pattern of compatible BMW vehicles. The center hole diameter is 75 mm, ensuring proper fitment on the hub.

DFC Brake Rotor - Drilled and Slotted - Black Product Line

The DFC Brake Rotor - Drilled and Slotted - Black line from Dynamite Friction focuses on rotors that combine drilled holes and slots with a corrosion-resistant black zinc finish. This product line is designed to provide enhanced braking performance and durability for vehicles requiring vented rotors with directional surfaces. The black zinc hat finish and rust-resistant coating help maintain rotor integrity under various driving conditions.

Applications and Problem Solving

• Compatible with BMW 230i, 328i xDrive, 335i, 440i Gran Coupe, M240i, and other listed models
• Reduces brake fade caused by heat buildup during aggressive or repeated braking
• Improves water and debris evacuation for consistent braking in wet conditions
• Minimizes rotor warping and extends service life with rust-resistant coatings
• Restores braking performance when original rotors are worn below discard thickness

Installation Notes and Tips

• Ensure rotor orientation matches the directional surface marking for proper airflow
• Check rotor thickness before installation; replace if below 22.4 mm discard thickness
• Clean rotor surface with brake cleaner to remove any protective oils before mounting
• Torque lug nuts to manufacturer specifications to avoid rotor distortion
• Inspect brake pads and hardware for wear during rotor replacement

Quality Assurance

Dynamite Friction manufactures the 633-31114L rotor to meet OEM specifications for fitment and performance on compatible BMW models. The rust-resistant coating and zinc black hat finish contribute to long-term durability. Warranty information is available through the manufacturer and should be consulted for specific coverage details.