PowerStop L3781 Disc Brake Caliper - Rear Right

PowerStop Rear OE Stock Replacement Caliper Overview

The PowerStop - Rear OE Stock Replacement Caliper (Part Number L3781) is designed specifically for Subaru Impreza and WRX STI models. This fixed disc brake caliper offers reliable braking performance with durable aluminum construction and precise engineering to match original equipment specifications.

• Fixed caliper type with two aluminum pistons
• Caliper casting made from lightweight aluminum
• Gray finish for corrosion resistance
• Piston diameter of 36.00 mm for consistent braking force
• Compatible with Subaru Impreza and WRX STI rear brake systems
• Inlet and bleeder screw thread size M10 x 1.0

Product Line Details: PowerStop - Rear OE Stock Replacement Caliper

The PowerStop - Rear OE Stock Replacement Caliper line focuses on providing direct replacement calipers that meet original equipment standards. This product line is engineered to restore braking performance to factory levels without requiring additional modifications. The L3781 caliper maintains the same mounting points and piston configuration as the original Subaru rear calipers, ensuring a straightforward replacement process.

Technical Description and Features

This disc brake caliper features a fixed design with two aluminum pistons, each measuring 36.00 mm in diameter. The use of aluminum for both the caliper casting and pistons reduces unsprung weight while maintaining strength and heat dissipation. The gray color finish helps resist corrosion and wear over time. The caliper is designed without included mounting hardware or caliper slides, so existing components must be reused or sourced separately. Thread sizes for the inlet and bleeder screw are both M10 x 1.0, matching Subaru's specifications for rear brake hydraulics.

Compatible Applications and Common Issues Addressed

• Replacement for worn or leaking rear calipers on Subaru Impreza and WRX STI
• Restores proper piston movement and brake pad engagement
• Addresses brake drag or uneven pad wear caused by faulty calipers
• Improves rear braking response and pedal feel
• Suitable for vehicles experiencing brake fluid leaks or piston corrosion

Installation Notes and Tips

• Verify compatibility with your specific Subaru Impreza or WRX STI model year
• Reuse existing mounting hardware and caliper slides as these are not included
• Ensure proper bleeding of brake system after installation to remove air
• Inspect brake pads and rotors for wear and replace if necessary
• Follow manufacturer torque specifications for mounting bolts

Quality Assurance and Warranty

PowerStop manufactures this rear OE stock replacement caliper to meet or exceed original equipment standards. The aluminum construction and precise piston sizing contribute to consistent braking performance and durability. While specific warranty details are not provided, PowerStop products typically come with a limited warranty against defects in materials and workmanship. It is recommended to consult the product packaging or manufacturer for exact warranty terms.