The CST Extended Travel Uni-Ball Upper Control Arms CSS-C2-10 extends travel on your 2001-2010 GM 2500HD/3500HD. Featuring a CNC mandrel bent 1026 DOM seamless tube construction that is professionally mig welded. Exclusive sealed-top uniball cup to keep out dirt and maximize uni-ball life. The 1" FK PTFE lined stainless steel uniballs maximumze potential suspension travel. 17-4 stainless steel CNC machined taper pins and 17-4 stainless steel hi-misalign spacers provide corrosion resistance and OEM like fitment. Control arms paired with coilover shocks provide up to 2.5 inches of added wheel travel! Features:Â High Quality Gloss Black Powdercoat FinishÂ Greasable Two Stage Polyurethane Bushing PivotsÂ CST Superior fit, function and finish. Made in the U.S.A.