Intercepter,,,,i just bought my 2" lift kit,but havnt installed it yet
they said for the 660 Grizz the OEM "rear" axles wont hold up,and you have to upgrade only the rear axles to Gorilla axles,or the equivalant
the reason being,when the kit is installed,it rotates the rear axles,and the OEM axles wernt designed to handle the stress at that angle
the best price i could find for Gorilla axles was $359 per axle,but their heavy duty,,,like an inch thick,and claims of beig 60% stronger than the OEM
they also have a 1 year warranty