1930-1931 Packard Model 826 UltraMat Sound Deadening insulation Deadener Heat In Cabin Kit , Model 8261930 1931 Packard Model 826 UltraMat Sound Deadening insulation Deadener Heat In Cabin Kit The engineering team at Zirgo Sound Labs has specifically designed this kit for your 1930 1931 Packard Model 826 Complete Cabin. This kit includes all the correct material needed to reduce echoes, drones and unwanted rattles resulting in a quieter ride. The exclusive advance design of the open closed cell foam wall helps remove unwanted sounds by absorbing