This is a bespoke/custom 40lbs/inch turbo clutch pedal spring. OEM uses 2x 80lbs/inch springs.
These are useful for those who want to fine tune their clutch pedal stiffness by mixing up springs. Example, 1x 80lbs and 1x 40lbs for 120lbs instead of 160lbs from factory. This will result in a slightly stiffer clutch pedal.
Price is for per 1 spring