Note: On aluminum fenders all fender holes will need to be drilled (unless ordering the slotted fenders). When ordering poly fenders please have tire size & shape of lights inset in the fender. If you have round lights and 13" tires you will need part# SPF13. If you have rectangular lights & 13" tires you will need part # SPFTD13 or # BPFTD13. If you have rectangular lights & 14" tires you will need part # SPFTD14 or # BPFTD14. When ordering undercarriages, if replacing one side we will need overall length, length of steps and hanger dimensions are like to ensure we get you the correct part.