This kit is an upgrade from the old worn out original unit. This fits under the original throttle pedal in the cab area and gives a smoother pedal action and a return spring on the pedal itself gives a solid feel.
The return spring stops you having to add extra springs on the carb/carbs. Kit includes small 8mm wrench to help with fitting the joint to pedal.
Rubber boot shown in picture is not included but is available separately (see part #211-721-621)