For Chevy/GMC C/K Series GMT400 5.0L/5.7L V8 Silver Cold Air Intake Pipe+Heat Shield+Red Filter High quality built washable and reusable air filter Provide better throttle response and stop sucking in hot air from high temperature engine component Better fuel mileage with improved combustion Improve up to 95% filtration efficiency; Increase 15 to 20 horsepower Intake inlet size: 4"