~Pair of rear upper control arms fits Nissan S13,S14,S15, Z32, R32, R33, Y33, C33, C34 ~ Unique shape clears larger axle upgrades such as Z33 axles or DSS axles with our drop knuckles, ~ lifetime manufacturers defect warranty ~ Japanese DOM tubular construction ~ PTFE lined low torque spherical bearings ~ Forged Clamping rod end receiver ~ Forged Clamping adjuster ~ Forged super long rod end has the most thread overlap and more adjustability than anything on the market ~ Bell shaped high surface area pillowball side spacers reinforce subframe mount & give freedom of PB motion ~ Laser cut 5mm thick 1 piece fork with reinforcement ~ Copper powdercoat finsh ***Our length priority is for max thread overlap and strength when going for Zero camber (for best drift tire wear and traction) however the fitment crowd is always asking what the negative camber ability is. That involves variables like RLCA length, ride height, and combining with subframe risers and drop knuckles changes the camber gain upon compression too. With the jam nuts removed ours is 11.5" or 292mm & stock is 12.125" or 308mm. These arms may contact the coilovers when running 8" springs or helper springs. So adjustable traction rods are recommended to be able to adjust clearance to the coilover.