
Internal hose degradation and environmental wear can lead to pressure loss, uneven caliper response, and dangerous fluid leaks, especially under demanding fleet conditions. Replacing worn brake lines or caliper assemblies with a high-quality, OE-style caliper ensures instant hydraulic response, reducing volumetric expansion and caliper drag that compromise braking performance. This caliper assembly delivers a direct fit, restoring full braking capacity and safety for heavy-duty applications.
Constructed with a floating caliper design and mounting bracket, this PowerStop OE replacement caliper is engineered for durability and ease of installation. It features new seals, guide pins, dust boots, bleeder screws, and stainless-steel hardware, all assembled using premium lubricants to ensure smooth operation even in extreme conditions. Fully pressure tested and inspected, it guarantees high-performance braking with reliable, hassle-free fitment for fleet and personal vehicles alike.
- Overall Length: 9.0-inch
- Fitting / Outlet Size: 10mm INV thread
- Application: Commercial-Grade / Heavy-Duty Fleet / Passenger Automotive Cross-Over
Part Numbers
- Part Number: L1591
Expert Installation & Field Note
Our shop experience specializing in heavy-duty brakes since 1985 emphasizes the importance of proper hose routing to prevent chaffing and ensure full steering lock clearance. Always verify that your existing line length, banjos, or flare fitting threads match the replacement before ordering, as fleet applications and wheelbase variations often alter line routing. Properly securing lines to chassis brackets and avoiding excessive twisting during installation are critical to maintain hydraulic integrity and prevent leaks or line fatigue over time.
Before ordering, physically inspect your existing brake line length, flare fittings, and banjos. Fleet and utility vehicles often have mid-year production changes and wheelbase variations that impact line routing. Confirm fitment to avoid delays or installation issues.
Features:
- Constructed with new seals, guide pins, dust boots, bleeder screws, and stainless-steel hardware for durability
- Premium lubricant ensures smooth caliper operation and long-lasting performance
- Fully pressure tested and inspected for high-quality brake performance
- Direct bolt-on replacement with no modifications required
- High-temperature EPDM rubber dust boots for reliable sealing in extreme conditions



