The Injen RD1425P is a polished RD-series cold air intake built for the 1.8L four-cylinder of the 1997-2001 Acura Integra Type R, the DC2 chassis. Injen lists it as a direct fit for the 1997-2001 Acura Integra Type R L4-1.8L. Its intake tube is mandrel-bent 6061-T6 aluminum, and the filter is a fully serviceable Injen SuperNano-Web dry air filter. Buyers chasing a cleaner, track-style engine bay look should note that the manufacturer also offers this system in a polished or a powder-coated black finish.
Compared with a cheap universal pod filter, the case for this kit rests on tuning, legality, and support. The manufacturer says the system keeps safe air fuel ratios throughout the powerband, and its dyno tuned design is meant to work without a custom calibration. The manufacturer's CARB list assigns the D-476-3 Executive Order to its Acura RD-series intakes, which matters where emissions inspections apply. Backing it up, Injen includes a limited lifetime warranty. Owners on user forums comparing intakes on the closely related DC5R Integra Type R have reported that measured gains between designs are small, so expect an upgrade in sound, throttle response, and engine bay presentation as much as a large dyno jump.
The manufacturer lists this kit only for the Integra Type R. Its LS and RS 1.8L models are covered by a separate part, the RD1420P, per the manufacturer's CARB list.
The manufacturer describes the SuperNano-Web dry filter as fully serviceable and lists X-1014-BB as the replacement filter part number.
The manufacturer states that installation requires mechanical skills and strongly recommends having a professional mechanic install the system.
The manufacturer's install sheet for this 1997-2001 Integra Type R system describes loosening the clamps on the air box and throttle body, releasing the air box lid latches, and removing the stock air box and duct. The new intake is then positioned in the engine bay, its filter end seated in the resonator opening, and the mounting point secured with a 6mm flange nut and fender washer before the filter clamp is tightened. Do not attempt the install while the engine is hot. Because the manufacturer calls for mechanical skill, allow extra time for alignment, and plan on checking clearance around the intake mounts before final tightening.
