PowerStop L4638B Disc Brake Caliper - Front Left

PowerStop Front OE Stock Replacement Caliper Overview

The PowerStop - Front OE Stock Replacement Caliper (Part Number L4638B) is designed to provide reliable braking performance for select Buick, Chevrolet, and Pontiac models. Engineered as a direct OE replacement, this disc brake caliper ensures consistent stopping power and durability for vehicles like the Chevrolet Impala and Pontiac Bonneville.

• Cast iron caliper casting for strength and heat resistance
• Single steel piston with a 63.42 mm diameter for effective braking force
• Floating caliper design for smooth operation and even pad wear
• Includes caliper slides and mounting bracket for proper fitment
• Compatible inlet and bleeder screw thread size (M10 x 1.5) for easy brake line connection
• Gray finish matching OE appearance

Detailed Product Description

This PowerStop disc brake caliper is constructed from durable cast iron, providing the necessary strength and heat dissipation required for front brake applications. The floating caliper design allows the caliper to move laterally, ensuring even pressure distribution across the brake pads. Equipped with a single steel piston measuring 63.42 mm in diameter, this caliper delivers consistent braking force suitable for regular grade use. The inclusion of caliper slides and a mounting bracket facilitates proper installation and alignment, maintaining the original equipment specifications.

Designed specifically for front brake systems, this caliper features an M10 x 1.5 inlet thread size and bleeder screw thread size, compatible with standard brake lines and bleeding tools. The gray color finish matches the OE stock appearance, making it a suitable replacement for maintaining the vehicle's original look.

PowerStop - Front OE Stock Replacement Caliper Product Line

The PowerStop - Front OE Stock Replacement Caliper line focuses on delivering direct-fit replacements that meet original equipment standards. This product line emphasizes durability and compatibility, ensuring that each caliper integrates seamlessly with the vehicle's existing brake system. The L4638B caliper is part of this line, designed to restore braking performance without requiring modifications or additional components.

Compatible Vehicles and Common Applications

• Buick LeSabre front brake replacement
• Chevrolet Impala front disc brake upgrade
• Pontiac Bonneville front caliper repair
• Chevrolet Monte Carlo front brake system maintenance
• Buick Park Avenue front brake component replacement

Installation Notes and Tips

• Ensure the brake system is fully depressurized before removal
• Verify compatibility with vehicle make and model prior to installation
• Use proper tools to avoid damaging the M10 x 1.5 inlet and bleeder threads
• Inspect brake pads and rotors for wear and replace if necessary
• Bleed the brake system thoroughly after installation to remove air

Quality Assurance and Warranty

PowerStop manufactures this caliper to meet or exceed OEM specifications, using cast iron and steel materials for durability and performance. While specific warranty details are not provided here, PowerStop products typically come with a limited warranty covering defects in materials and workmanship. Always consult the product packaging or manufacturer for exact warranty terms.