K&N Performance Air Intake System (57-3021-1)

K&N Performance Air Intake System (57-3021-1)A high density polyethylene (HDPE) rotationally molded tube helps increase the volume of airflow to your engine, and provides a guaranteed increase in horsepower and torque. These systems are paired with a washable, reusable High Flow Air Filter featuring oiled cotton filter media. The oversized, conical design allows you to go up to 100,000 miles between filter services under normal highway driving conditions. A custom heat shield helps protect

K&N Apollo Cold Air Induction Systems incorporate a washable/reusable K&N High-Flow Air Filter within a protective shell

4 inch inside diameter

Simply use K&N oil and cleaner to service your filter

The assembly comes with a 76mm air filter base flange and a 100mm housing intake diameter

Roto-molded HDPE intake tube paired with a direct replacement High-Flow Air Filter™

Includes a water-resistant DRYCHARGER® pre-filter

Silverado 1500

Free-flowing aluminum intake tube paired with a High-Flow Air Filter

Specifically designed for custom applications

K&N 10-Year/Million Mile Limited Warranty™

Designed to increase horsepower & torque

The 57S-4900 Performance Airbox comes with a custom shaped K&N high-flow air filter and a fully enclosed injection molded air box that connects up to the factory air intake hose