Porterfield Brake Shoes for 1991 FORD F150 4WD Compound:R4-S The FIRST-R Racing Seat meets

The FIRST-R Racing Seat meets FIA 8855-1999 standards

Relocates proportioning valve into cabin

this front bumper grille combines a sleek and aerodynamic design with the lightweight strength of carbon fiber

Two independent trays - Separate storage zones keep fasteners

F R Spring rate N/mm(kgf/mm) 157 ( 16 ) 98 ( 10 ) Free height (mm) 200 220 Spring type Straight Straight Barrel type Recommended range to change spring rate N/mm(kgf/mm) ±20 ( 2 ) ±20 ( 2 ) Specification of damper:

Porterfield Brake Shoes for 1991 FORD F150 4WD Compound:R4-S The FIRST-R Racing Seat meetsPorterfield Brake Shoes for 1991 FORD F150 4WD 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