2001-2005 Honda Civic EX LX SI Cold Air Intake System (CAI)

2001-2005 Honda Civic EX LX SI Cold Air Intake System (CAI) works by replacing your factory intake air box with a simple tubing that direct air intake to the engine. Aftermarket performance intake usually are able to pickup cooler air from outside the engine bay. Cooler air contains more oxygen than warm air, so it helps your engine burn fuel more efficiently, thus increasing boost and engine performance.