Garage Door Low Headroom Conversion Kit. Reduces headroom requirements for installation. Designed to modify the standard track. Reduces headroom requirement (see product copy for details). Reduces headroom for standard and EZ set extension spring systems to 4 1/2 in. Reduces headroom for EZ-set torsion spring system to 9-1/2 in. Maximum garage door height. Works on 12 in. The Clopay Garage Door Low Headroom Conversion Kit bay be required if you have less than 15 in. Of headroom in your garage (see More Info below for a PDF of our How to Measure guide). Easily converts your new track to accommodate your low headroom application. Detailed installation instructions and all necessary hardware included. Garage Door Part/Accessory Type: Garage Door Opener Low Headroom Conversion Kit.