K&N Performance Cold Air Intake Kit 57-1529 with Lifetime Filter for 2002-2012 Dodge Ram 1500 4.7L V8 Estimated horsepower gain of 8.63 HP at 4688 RPM ; Designed to improve throttle response and engine sound Lasts up to 100,000 miles before service is required (depending on driving conditions) Replaces entire factory air intake system The K&N 57-1529 Air Intake fits some Dodge Ram 1500 Pickup, Ram 1500, and Ram Ram Pickup models; Intake Pipe Material Easy to install, usually in 90 minutes or less ; High-Density Polyethylene