Thermal Cover Cold Air/Short Ram Intake Pipe Thermal Engine Bay Sock Orange P5 for Chevrolet Impala Purchase includes one (1) snuggie. Covers are 7 inches long (178mm). Fits up to 4 inch (102mm) diameter air intake pipe For longer intakes please purchase multiple snuggies. Due to the length of most intake pipes, we HIGHLY recommend buying at least 2 pcs