Porterfield Brake Pads for 2012 PORSCHE Boxster Spyder w/Iron Discs Compound:R4-E Direct replacement rear O2 sensor

Direct replacement rear O2 sensor for catalytic converter monitoring and emissions control

Deep gouges in ABS are harder to repair cosmetically

making your Mustang 100% emission compliant while providing an aggressive muscle car sound

Fits 2004-2008 Pontiac Grand Prix

Porterfield Brake Pads for 2012 PORSCHE Boxster Spyder w/Iron Discs Compound:R4-E Direct replacement rear O2 sensorPorterfield Brake Pads for 2012 PORSCHE Boxster Spyder w Iron Discs Porterfield R4 Porterfield R4 Carbon Kevlar based brake pads were fully designed for heavy duty extreme motorsports use. Its one of the the few true motorsports competition pads available on the market today. The carbon based semi metallic R4 brake material allows the brake pad to absorb huge amounts of heat and dissipate it quickly and evenly over time. The Carbon Kevlar material