Add some easy horsepower to your Ride with this RD Series Performance cold air intake (CAI) from Injen Technology! The engineers at Injen have spent considerable amounts of time designing, testing, and perfecting this CAI to produce some serious bolt-on power while also providing amazing engine bay aesthetics. In addition to the impressive power increase, the Injen team has ensured that safe Air fuel (A/F) ratios are maintained throughout the powerband. RD Cold Air Intake System, Part No. RD3015P, 1999-2005 Volkswagen Golf / Jetta L4-1.8L Turbo, 1999-2005 Volkswagen Golf / Jetta L4-2.0L. Race Division Intake VW 99-05 Jetta IV; Golf IV 1.8T; 2.0L Turbo CARB 99-03 2.0L/99-04 1.8T Only