These performance sets of fully adjustable upper links contain the new xAxis(TM) Sealed Flex Joint to eliminate bushing deflection and maximize handling response. Each set allows camber and/or caster adjustment of ±1.50°. The 6061-T6 forged aluminum ends with large 18mm threaded adjuster links make this the strongest kit available. *NOTE: This is a performance part, if OE type noise isolation levels are desired use our 81373 arm set.