The Hendrickson S-40878-3 is a genuine Hendrickson brake chamber for Hen 3 suspension applications, also referenced as S408783. This part is sold by Pro Gear and Transmission for fleet maintenance and repair operations that specify Hendrickson suspension components. If you need to verify proper fitment for your specific suspension configuration, give us a call and we can help you track down the right part for your application.FeaturesGenuine Hendrickson part number S-40878-3 or S408783Designed for Hendrickson Hen 3 suspension systemsDirect-replacement brake chamber for Hendrickson-equipped vehiclesSold by Pro Gear and Transmission