K&N Performance Air Intake Kit 77-1561KP with Polished Metal Tube for Dodge Ram Pickup Truck 1500 2500 5.7L V8 Estimated horsepower gain of 10.3 HP at 4382 RPM Designed to improve throttle response and engine sound Easy to install, usually in 90 minutes or less. Air Filter Height: 8 inch, Air Filter Large End Diameter: 7.5 inch Replaces entire factory air intake system ; Fits 2009-2018 Dodge RAM with 5.7L Hemi V8 Lasts up to 100,000 miles before service is required (depending on driving conditions)