Fitment Guide:
Challenger Tractor: MT525B, MT535B – w/o Tier III Caterpillar Engine, MT545B – w/o Tier III Caterpillar Engine, MT555B – Non Tier III Models, MT565B – Non Tier III Models, MT575B – Non-Tier III Models, MT635B – Tier II & III Models, MT645B – Tier II & III Models, MT655B – Tier II & III Models, MT665B – Tier II & III Models