Wehrli 01-04 Duramax LB7 Stage 2 High Flow Intake Bundle Kit - Illusion PurpleSignificantly increases air flow to your turbo producing improved horsepower and torque, quicker throttle response, and cooler intake temperatures by drawing cold air through the inner fender. All aluminum construction features large diameter 4" piping with smooth aerodynamic bends to improve intake air velocity, volume, and provide more aggressive engine and turbo sound during acceleration. Removable air box lid element allows for easy visual