Dynamic Friction 631-47001L Disc Brake Rotor - Front Left

Brake Rotor Overview

The Dynamic Friction 631-47001L is a front left disc brake rotor with a slotted and drilled surface for controlled brake pad contact. It is built for 4-lug applications with a 100 mm bolt circle and a zinc silver hat finish for added corrosion resistance.

Compatible with select Chevrolet Spectrum, Geo Spectrum, and Isuzu I-Mark applications, this rotor is a fitment-specific replacement for vehicles that use the listed dimensions and mounting pattern. The 631-47001L combines a plain disc finish with a directional braking surface to support consistent braking performance.

Key Features

• Slotted and drilled rotor surface for improved pad bite and heat management.
• Zinc silver hat finish with rust-resistant coating for added surface protection.
• Solid rotor construction with 227 mm outside diameter and 42 mm height.
• 4-bolt, 4-lug design with 100 mm bolt circle and 57 mm center hole.
• Directional brake surface for application-specific installation.

Fitment Details

Fits 1989 Geo Spectrum, front left, without F41 Package.

Fits 1985-1989 Isuzu I-Mark, front left.

Fits 1985-1988 Chevrolet Spectrum, front left.

This part cross-references no listed interchange numbers for the same application.

Common Replacement Uses

• Worn rotor surfaces that cause brake pulsation.
• Corrosion on the rotor hat or braking surface.
• Reduced braking consistency from heat buildup.
• Uneven pad contact on a directional rotor setup.

Installation Notes

Verify rotor dimensions, bolt pattern, center hole diameter, and directional orientation before installation. Confirm the vehicle uses a front left rotor and match any listed notes, including the 1989 Geo Spectrum without the F41 Package.

Quality Assurance

Dynamic Friction identifies this rotor as part of its DFC Brake Rotor - Drilled and Slotted - Silver line, which focuses on application-specific brake rotor design and corrosion-resistant finishing.