This Porterfield brake pad set is built for Porsche Boxster S with Ceramic Rotors (2009) for rear brake applications. Porterfield is a long-established brake supplier with deep experience in performance street, autocross, racing, and motorsport brake applications, including brake pads, brake shoes, and related braking components.

Compound options include R-4 for race-focused temperature ranges, R4-E for longer high-temperature endurance use, and R4-1 where that compound is preferred for the application. Porterfield-branded components are intended as direct-fit brake components for Porsche applications when matched to the correct position, compound, and brake package.

Technical Details

• Manufacturer part number: AP994
• Type: Performance street / racing brake pad set
• Compound: R-4, R4-E, R4-1
• Position: Rear

Fitment & Compatibility

Confirm the selected position, compound, model year, brake system notes, and rotor/caliper details before ordering. If you need help checking fitment, send PMB Performance your VIN or brake setup details.

PMB Performance has over 20 years of hands-on Porsche brake experience and can help match the correct Porterfield compound to street, autocross, track, or restoration use.