Centric 320.47030H Disc Brake Rotor - Rear

Centric GCX Rear Brake Rotor for Subaru

The Centric GCX Elemental Protection Disc Brake Rotor, part number 320.47030H, is built for rear brake service on select Subaru applications. It combines a fully coated finish with high carbon metallurgy to support OE-style braking performance while helping resist rust and corrosion.

Key Features

• Fits 2013-2017 Subaru WRX STI, rear
• Fits 2008-2014 Subaru Impreza, rear
• Part number 320.47030H for rear disc brake replacement
• Fully coated disc finish and coated hat for added corrosion resistance
• High carbon rotor metallurgy matched to OEM-style material profiles
• Vented rotor design with smooth surface type
• Outside diameter: 316.1 mm (12.445 in)
• Nominal thickness: 20.0 mm (0.787 in); discard thickness: 18.0 mm (0.709 in)
• 5-lug pattern with 114.3 mm (4.5 in) bolt circle
• Pillar vane style for rear brake cooling support

Product Details

Centric’s GCX Elemental Protection line is application-specific, with coating patterns and rotor metallurgy selected to align with OE brake requirements. This rotor uses Centric’s RS200-style protection on non-mating surfaces to help maintain appearance and reduce corrosion exposure over time. The high carbon construction is designed to match the OEM metallurgical profile used on the Subaru WRX STI and Subaru Impreza rear brake setup, supporting consistent brake feel and rotor durability.

For shoppers searching for a rear brake rotor for 2013-2017 Subaru WRX STI or a rear disc brake rotor for 2008-2014 Subaru Impreza, part number 320.47030H provides a direct-fit option in the Centric GCX family. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Rotor Helps Address

• Rear brake pulsation caused by worn or uneven rotor surfaces
• Rust and corrosion on exposed rotor surfaces
• Reduced braking consistency from rotor wear beyond discard thickness
• Brake noise related to surface condition and rotor degradation
• Fitment issues when replacing a rear rotor on Subaru WRX STI or Impreza applications

Installation Notes

Verify rear fitment by year, model, and rotor dimensions before installation. Confirm the 5-lug, 114.3 mm bolt circle, 316.1 mm outside diameter, and 20.0 mm nominal thickness against the vehicle’s original rotor specifications. Inspect pads, caliper hardware, and hub condition during service so the new rotor seats correctly and wears evenly.

Quality Assurance

Centric engineers the GCX rotor line to match OE performance targets and uses application-specific coating and metallurgy choices to support consistent fitment and corrosion protection. Part number 320.47030H is built as a rear replacement rotor for the listed Subaru applications.