PowerStop L4638A Disc Brake Caliper - Front Left

PowerStop Front OE Stock Replacement Caliper Overview

The PowerStop - Front OE Stock Replacement Caliper (Part Number L4638A) is designed to provide reliable braking performance for select Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac vehicles. Engineered as a direct OE replacement, this floating disc brake caliper ensures consistent stopping power and durability.

• Cast iron caliper casting for strength and heat resistance
• Single steel piston with a 63.50 mm diameter for effective brake force
• Includes caliper slides and mounting bracket for proper fitment
• Gray finish for corrosion resistance and OEM appearance
• Compatible with front brake systems on multiple GM models
• Bleeder screw thread size M10 x 1.5 for standard brake bleeding

Detailed Product Description

This PowerStop front disc brake caliper is constructed from durable cast iron, providing the necessary rigidity and heat dissipation required for front brake applications. The floating caliper design allows for smooth piston movement and even pad wear. Featuring a single steel piston with a 63.50 mm diameter, this caliper delivers consistent hydraulic pressure to the brake pads, ensuring reliable stopping power. The caliper slides and mounting bracket are included to facilitate proper installation and alignment. Finished in gray, the caliper maintains a clean, OEM-style look while resisting corrosion over time.

Compatible Vehicles and Applications

This caliper is compatible with front brake systems on a range of GM vehicles, including Buick Aurora, Cadillac DeVille, Eldorado, Seville, Chevrolet Impala, Monte Carlo, Oldsmobile Intrigue, Pontiac Bonneville, LeSabre, Park Avenue, and Riviera. The PowerStop - Front OE Stock Replacement Caliper (L4638A) is designed to meet the exact specifications of these models, ensuring proper fit and function.

Common Issues Addressed by This Caliper

• Uneven or reduced braking performance due to worn or damaged calipers
• Brake fluid leaks from piston seals or caliper body
• Caliper sticking or binding causing uneven pad wear
• Corrosion or physical damage compromising caliper integrity
• Noise or vibration during braking caused by faulty caliper operation

Installation Notes and Tips

Before installation, verify compatibility with your vehicle’s make and model. This caliper includes the mounting bracket and caliper slides but does not include mounting hardware. Proper brake fluid bleeding is required using the M10 x 1.5 bleeder screw thread size. Inspect brake pads and rotors for wear and replace if necessary to ensure optimal braking performance. Follow manufacturer torque specifications for mounting bolts to maintain safety and reliability.

Quality Assurance and Warranty

The PowerStop - Front OE Stock Replacement Caliper is manufactured to meet or exceed OEM standards for fit, form, and function. Constructed with high-quality cast iron and steel components, it is built for durability and consistent performance. While specific warranty details are not provided, PowerStop products typically undergo rigorous quality control to ensure reliability in automotive brake systems.