This Polaris 7042158-067 Spring, Torsion, .359/77, Firm RH [OPT] fits the following models and components:
Polaris Snowmobile 2003 PRO X 600/700/800 - S03NX6ES-S03NX7CS-S03NX8CS Rear Torque Arm
Polaris Snowmobile 2003 PRO X 440 FAN COOLED - S03NX4FS Rear Torque Arm
Polaris Snowmobile 2004 PRO X 550 FAN - S04NX5B-BE Rear Torque Arm
Polaris Snowmobile 2002 PRO X 600 - S02NX6ES Rear Torque Arm
Polaris Snowmobile 2004 PRO XR 800 - S04NZ8CS Rear Torque Arm /Csa/Ce
Polaris Snowmobile 2004 PRO X/PRO X2 600/700/800 - S04NX6ES Rear Torque Arm /Ee/S04ny6es/Ee/S04nx7cs/8Cs/S04ny7cs/Ce/8Cs/8Ce