SLP pioneered the underhood cold air package for the Camaro and Firebird. They replace the restrictive, power robbing factory air cleaner assembly. By picking up cool, dense outside air and pumping it directly into the engine these systems are proven to make up to 20 additional horsepower, depending on application. Each kit includes custom designed air boxes and ductwork, air filters and all the necessary parts for easy bolt on application. Complete installation instructions are also included. These kits are legal for street use in all 50 states. E.O. #D-187-12.