Raise or lower your clutch engagement with these primary clutch springs.
These RPM ratings depend on the ramps that are in the clutch.
Black Spring produces 140-210lb of resistance and an engagement of between 3600 - 4200 RPM with less than 400 horsepower and 3800 - 4500 RPM with 400 plus horsepower.
Red Spring produces 160-270lb of resistance and an engagement of between 4200 - 5000 RPM. This spring is typically used on 400 plus horsepower configurations for racing.
Blue Spring produces 100-190lb of resistance and an engagement of between 3200 - 3800 RPM with less than 400 horsepower.
TAPP Clutch Holding Tool