The Injen RD Cold Air Intake in black (part RD3015BLK) is a mandrel-bent aluminum intake for the 1999-2005 Volkswagen Golf and Jetta. The manufacturer lists it as a direct fit for the 1.8L turbocharged four-cylinder and the 2.0L four-cylinder, and it is built from premium TIG-welded 6061-T6 aluminum. Because this is a special-order part, plan for a longer lead time than an in-stock intake. Compared with the factory airbox, the smooth tube path is designed to reduce restriction and bring in cooler, denser air from deep in the engine bay. The manufacturer says it provides power gains while keeping A/F ratios stable with no added tuning, which matters if you want a bolt-on upgrade without a remap. The kit carries Injen's limited lifetime warranty on intakes and includes a serviceable SuperNano-Web dry filter. Keywords: 99-05 VW Jetta IV 1.8T cold air intake, Golf IV 2.0 CAI no tune, Injen RD3015BLK, MK4 GTI intake DIY.
Before ordering, confirm your exact trim and model year, since fitment charts vary by sub-model, and check California emissions eligibility. The manufacturer lists CARB EO D-476-5 for the RD line, but applicability can depend on model year, so verify it with Injen for vehicles registered in California. Installation is a driveway job for most enthusiasts, but it requires some mechanical skill and careful alignment of the tube and clamps. Disconnect the battery, let the engine cool, and recheck clearance once the intake is secured.
The manufacturer lists a direct fit for the 1.8L turbocharged and 2.0L four-cylinder engines in 1999-2005 Golf and Jetta models. Year and sub-model coverage varies across fitment charts, so confirm your exact vehicle with the manufacturer before ordering.
The manufacturer states the intake is designed to drop in without an expensive tune and claims power gains while maintaining A/F ratios with no additional tuning.
The manufacturer lists replacement air filter part number X-1010-BB for this intake system.
The manufacturer lists CARB EO D-476-5 for the RD series. Whether that covers your specific model year and registration should be confirmed with the manufacturer before purchase.
Installation is a moderate DIY job. The manufacturer's install sheets for other Injen intake kits note that the work requires some mechanical skill and that a qualified mechanic is always a good option. Disconnect the negative battery terminal before starting, and do not work on the intake while the engine is hot. Expect to loosen and reposition the intake tube clamps, then reseat the MAF sensor clamp, which typically uses an 8mm driver on Injen kits. Align the entire system before fully tightening the clamps, and recheck alignment and clearance periodically, because the manufacturer warns that misalignment can cause damage and void the warranty. Reconnect the battery before starting the engine and test for air leaks.
