The AST linear race spring is a single coil spring sized at 180mm length with a 65 N/mm rate and a 61mm inner diameter. It provides a consistent linear spring rate for race-oriented setups and is sold individually so you can mix rates on different corners. Check the 180mm length, 65 N/mm rate and 61mm ID against your application to ensure proper fitment before ordering.
AST Linear Race Springs - 180mm Length x 65 N/mm Rate x 61mm ID - Single