Fits: 1975–1978 Nissan 280Z 1979–1983 Nissan 280ZX 1977–1980 Nissan 810 1970–1973 Nissan 240Z 1974 Nissan 260Z 1968–1973 Nissan 510 Energy Suspension7.7102RBushing KitsThese performance polyurethane components help reduce common wheel roll-under. This occurs when stopping abruptly, especially when using performance tires. For both front of rear drive vehicles is so equipped. Replaces that original, short lived and too-soft O.E.M. rubber. On front wheel drive vehicles- diminishes wheel hop and traction loss during standing start accelerations. Better maintains proper alignment under extreme conditions. Made of Energy's Hyper-Flex(TM) performance polyurethane to add both performance and durability.During hard "standing start" accelerations, Energy Suspension's strut rod bushings help control unwanted steering axis changes, diminishing wheel hop and reducing traction loss. While accomplishing all of this, they still allow the suspension to smoothly travel throughout its full operating range without binding.