This chrome, zinc die cast highway board set has steel backing plates and is fully adjustable with clamp-ons. This zinc die-cast, chrome-plated highway board set includes chrome steel backing plates for GL1200, '84-'87, and GL1500, '88 - '97. However, by using our 75 engine guards, these boards can be installed on ALL '75-'87 GoldWing models. And, by using our 99 engine guards, the '98' - '00 GL1500 can mount these highway boards. Read FAQ8. DISCLAIMER: Cannot be returned or exchanged unless there is a clear structural defect.