Hot and Cold Side Boot Kit for 1999.5-2003 Ford F250/F350, 7.3L Powerstroke is an S&B boot and clamp-related service part for the application or boot size shown in the title. It is intended for intercooler, intake, or charge-air connections where the correct diameter, length, and side location matter. Match the kit to the exact vehicle, engine, and component position before ordering; universal-size boots should be verified by measurement. This original description is based on the workbook title/category data for S&B part 83-2011.