The AST linear race spring is a single 150 mm coil spring with a 70 N/mm rate and a 61 mm inner diameter, intended for coilover-style suspension to alter ride height and spring rate. Supplied individually, it gives tuners a focused way to change corner stiffness and match dampers; confirm the 61 mm seat fitment on your coilover before fitting.
AST Linear Race Springs - 150mm Length x 70 N/mm Rate x 61mm ID - Single