PowerStop L4639B Disc Brake Caliper - Front Right

PowerStop Front OE Stock Replacement Caliper Overview

The PowerStop L4639B front disc brake caliper is designed for reliable braking performance on select Buick, Chevrolet, and Pontiac models. This OE stock replacement caliper offers a durable cast iron construction and a floating design to ensure consistent brake function and fitment.

• Cast iron caliper casting for strength and durability
• Floating caliper type with one steel piston (63.42 mm diameter)
• Includes caliper slides and mounting bracket for proper installation
• Gray finish for corrosion resistance
• Compatible with Buick Bonneville, Chevrolet Impala, Monte Carlo, Park Avenue, and Pontiac LeSabre
• Inlet and bleeder screw thread size: M10 x 1.5
• Part number L4639B for precise identification

About the PowerStop - Front OE Stock Replacement Caliper Line

The PowerStop - Front OE Stock Replacement Caliper line is engineered to meet original equipment specifications for front disc brake calipers. This product line focuses on delivering direct-fit replacements that maintain factory performance and reliability. The L4639B caliper is part of this line, providing a dependable option for restoring braking function on compatible vehicles without modifying existing brake components.

Detailed Product Description

The L4639B caliper features a cast iron body that offers robust resistance to wear and heat, essential for consistent braking under various driving conditions. Its floating caliper design allows for smooth piston movement, aided by the included caliper slides, which help reduce uneven pad wear. The single steel piston with a diameter of 63.42 mm ensures effective clamping force on the brake rotor. The gray finish adds a layer of corrosion protection, extending the caliper's service life. This caliper is designed with M10 x 1.5 inlet and bleeder screw threads, matching OE specifications for easy integration with existing brake lines and bleeding systems.

Compatible Vehicles and Common Applications

• Replacement for front disc brake calipers on Buick Bonneville and Park Avenue
• Suitable for Chevrolet Impala and Monte Carlo front brake systems
• Fits Pontiac LeSabre front brake assemblies
• Addresses issues such as sticking calipers, uneven brake pad wear, and brake fluid leaks
• Restores proper brake pedal feel and stopping power

Installation Notes and Tips

• Verify compatibility with vehicle make and model before installation
• Ensure brake fluid system is properly bled after caliper replacement
• Use appropriate tools for M10 x 1.5 inlet and bleeder screw fittings
• Inspect brake pads and rotors for wear and replace if necessary
• Do not reuse mounting hardware unless confirmed to be in good condition

Quality Assurance and Warranty

PowerStop manufactures the L4639B caliper to meet or exceed OEM standards for fit and function. The cast iron construction and steel piston materials are selected for durability and consistent performance. While specific warranty details are not provided here, PowerStop products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.