The BBK Power-Plus Series air intake kits feature a lightweight aluminum inlet plenum instead of plastic. This combined with CNC-machined, mandrel-bent inlet tubes and high-flowing, fenderwell-style conical filter box systems, they deliver maximum performance and add style to your engine compartment. They also use an aluminum plenum that is titanium powdercoated with a machine-finish logo and connects directly to the throttle body. The kits include a reusable high-flow cotton gauge air filter element that provides the maximum possible air flow, while still filtering out dirt and other small particles. If you are serious about adding some horsepower to your vehicle try one of these kits and you won't be disappointed. Application: 1999-2004 Chevy Silverado 1500 5.3L 1999-2000 Chevy Silverado 2500 5.3L 1999-2004 Chevy Silverado 2500 6.0L 2001-2004 Chevy Silverado 3500 6.0L 1999-2004 Chevy Silverado 1500 4.8L 2001-2004 Chevy Silverado 2500HD 6.0L 2001-2003 Chevy Silverado 1500HD 6.0L