Dynamite Friction 631-45019L Disc Brake Rotor - Front Left

Drilled and Slotted Front Left Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver, part number 631-45019L, is a vented disc brake rotor built for the front left position. It features a slotted X drilled surface, zinc silver hat finish, and a rust resistant coating for a clean, service-ready appearance.

Compatible with 2013-2019 Cadillac XTS front left and 2014-2017 Buick Regal front left, this rotor is sized for 5-lug applications with a 120 mm bolt circle and 67.5 mm center hole diameter. The directional braking surface is engineered to match the rotor’s rotation-specific design.

Key Features

• Part number 631-45019L
• Disc brake rotor for the front left position
• Slotted X drilled surface type
• Vented rotor construction
• Zinc silver hat finish with rust resistant coating
• 5 bolt holes and 5 stud/lug holes
• Outside diameter: 345 mm
• Nominal thickness: 30 mm; discard thickness: 27 mm
• Bolt circle diameter: 120 mm
• Directional brake surface design

Product Details

This DFC Brake Rotor - Drilled and Slotted - Silver is built around the listed dimensions for proper front axle fitment on Cadillac XTS and Buick Regal applications. The drilled and slotted face supports consistent pad contact, while the vented rotor design helps manage heat during repeated braking. The silver zinc hat finish and rust resistant coating add corrosion protection where the rotor is exposed to road moisture and debris. If you are replacing a worn front left rotor on a 2013-2019 Cadillac XTS or a 2014-2017 Buick Regal, part number 631-45019L matches the specified OE-style dimensions and mounting pattern.

Common Issues This Rotor Addresses

• Brake pulsation from a worn or uneven rotor surface
• Reduced braking consistency from excessive rotor wear
• Corrosion on the rotor hat and exposed surfaces
• Noise caused by a damaged or heat-affected rotor
• Front left rotor replacement on 5-lug Cadillac XTS and Buick Regal models

Installation Notes and Tips

Verify rotor diameter, thickness, bolt circle, and center hole diameter before installation. This rotor is directional, so confirm the rotation orientation during mounting. Inspect pads, caliper hardware, and hub condition at the same time to help ensure even contact across the new braking surface. For best results, clean the hub face before installing the rotor and follow the vehicle manufacturer’s torque specifications.

Quality Assurance

Dynamite Friction identifies this rotor by precise dimensional specifications, including 345 mm outside diameter, 30 mm nominal thickness, and 27 mm discard thickness. The zinc silver hat finish and rust resistant coating support long-term appearance and corrosion resistance in normal brake service.