PowerStop AR82158XPR Disc Brake Rotor Set - Rear

Overview

The Power Stop AR82158XPR is a rear disc brake rotor set built for direct OE fitment and improved thermal management. It combines cross-drilled and slotted rotor surfaces with a zinc dichromate coating to help maintain clean friction contact and resist corrosion.

Compatible with Cadillac ATS rear brake applications, this rotor set is engineered for drivers who want a bolt-on replacement with performance-focused surface design. The AR82158XPR is also a fitment match for 2017 Cadillac ATS rear applications with a 321mm front rotor.

• Cross-drilled and slotted surface helps move heat, gas, dust, and moisture away from the braking surface.
• Silver zinc dichromate plating adds rust and corrosion resistance.
• Vented rotor construction supports heat dissipation under demanding braking conditions.
• Direct OE fit reduces the need for special modifications.

Detailed Fitment and Design

Power Stop designed the AR82158XPR as a rear brake rotor solution for Cadillac ATS models from 2013-2018, with a specific 2017 Cadillac ATS rear application noted for vehicles equipped with a 321mm front rotor. The 12.40-inch outside diameter, 5-lug bolt pattern, and vented construction align with the listed application data, while the slotted X drilled surface is intended to keep the pad contact area cleaner during repeated stops. This part number, AR82158XPR, is a practical OE-style replacement for buyers looking for a rotor set with corrosion protection and a performance-oriented finish. The AR82158XPR also cross-references Raybestos Brakes 581045 for the same application.

What It Helps Address

• Brake fade during repeated or high-heat stops
• Surface contamination from dust, gas, and moisture buildup
• Rust and corrosion on exposed rotor surfaces
• Fitment issues when replacing a worn rear rotor with an OE-style part

Installation Notes and Tips

Install on the rear axle only for the listed Cadillac ATS applications. Confirm rotor diameter, bolt pattern, and the 2017 application note before ordering. Because this rotor is a direct OE fit, no special modifications are needed when used on the confirmed applications.

Quality Assurance

Power Stop positions this rotor as a bolt-on upgrade with OE fitment and corrosion-resistant plating. The drilled and slotted design is engineered for consistent cooling and braking surface cleanup in demanding conditions.