PowerStop AR8670SCR Disc Brake Rotor - Rear

Rear coated brake rotor overview

The PowerStop AR8670SCR is a rear disc brake rotor built as a direct bolt-on replacement for original equipment. It is made for drivers who want OE-style fitment with corrosion protection on the hat, outer edge, and vanes.

Key features

• Partially coated rotor with silver epoxy on corrosion-prone areas
• Full cast construction with mill balancing for consistent operation
• Solid rotor design with a smooth surface finish
• Matches original equipment weight and vane count for fitment accuracy
• Rust-resistant coating helps preserve appearance behind alloy wheels

Detailed fitment and design

PowerStop designed the AR8670SCR to match original equipment performance and specifications while providing added corrosion resistance. The 11.50-inch outside diameter, 4.53-inch bolt circle, and 5-lug pattern support precise replacement fitment. This rear rotor is a practical choice for Buick Lucerne and Cadillac DTS applications where OE-style dimensions and a clean wheel-facing finish matter. The AR8670SCR also uses a solid rotor layout and smooth friction surface for straightforward service replacement.

What this rotor helps address

• Corrosion on exposed rotor surfaces
• Visible rust buildup behind alloy wheels
• Replacement needs for worn rear brake rotors
• Fitment issues caused by mismatched OE dimensions

Installation notes and tips

Fits 2006-2011 Buick Lucerne, rear. Fits 2006-2011 Cadillac DTS, rear. Verify rotor diameter, bolt circle, and hub dimensions before installation. This part cross-references GM (e.g., 19303807, 19303813) for the same application.

Quality assurance

PowerStop builds this rotor to match original equipment performance and specifications, including weight and vane count, to support accurate replacement fitment.