CAN-AM DEFENDER HD11 PROMOUNT PUSH FRAME EXTENSION - 715009461The Can Am Defender HD11 ProMount push frame extension Apache Track owners need is this 13. 5 inch extension, designed to correct your plow angle when Apache Track systems are installed. When you add tracks to your Defender, the front end sits higher and your blade loses ground contact, which kills your plowing efficiency. This extension puts the frame back at the right angle so your blade stays sharp and planted against the surface. It's a direct fit