Porterfield Brake Pads for 2007 SCION xA Compound:R4-E Unique design yields significant power

Unique design yields significant power increase over standard hydraulic lifters

Hardware to mount the header at the engine block is not included — source bolts that match your factory mounting points

Sensor installation typically does not require additional gaskets — it threads directly into the factory location

Hydraulic-Great Torque and Smooth idle for fuel injected

Hard panel construction with integrated LED daytime running light rings

Porterfield Brake Pads for 2007 SCION xA Compound:R4-E Unique design yields significant powerPorterfield Brake Pads for 2007 SCION xA 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 also allows the brake pad to