Founders Performance 23811R-PHR Lower Control Arms & Panhard Bar Red - Car Set Founders Performance Lower Control Arms & Panhard Rod Kit Lower Control Arms Founders Performance LLC has designed the strongest set of non adjustable lower control arms on the market. These control arms are a direct replacement to your weak, factory stamped rear lower control arms. These control arms are constructed of high strength 1.75" OD steel tubing with CNC machined ends and laser cut main tubes for the ultimate in fit and finish. Founders Performance control arms are supplied with fluted greasable Energy Suspension polyurethane bushings for a low maintenance control arm kit. Performance Lower control arms are one of the first parts that should be done on the 3rd or 4th generation F-body.