The restrictive factory air filter and air intake housing are replaced by the K&N Typhoon air intake which is designed to dramatically reduce air flow restriction as it smoothes and straightens air flow.
KN 63-1579 Aircharger Performance Intake System for Jeep Grand Cherokee 6.2L V8
KN 57-3057 Performance Intake System Kit for 05-07 Silverado/Sierra 2500 HD 6.6L
Ramair 2.75 inch 70mm ID Universal Dry Clamp-On Performance Intake Air Filter
K&N 63-9029 Performance Intake Kit w/ Filter for 05-08 Toyota 4 Runner 4.7L V8
FEL - PRO 1312 - 2 LS1 - LS6 Performance Intake Gasket .045in
Ramair 3.1 inch 80mm ID Universal Dry Clamp-On Performance Intake Air Filter