The Injen IS1550P is a polished short ram intake for the 1996-1998 Honda Civic EL, EX, and HX with the 1.6L L4. It replaces the factory airbox with a mandrel-bent T6-6061 aluminum tube that sits in the stock airbox location. The manufacturer says it adds power while keeping air/fuel ratios stable with no additional tuning, so a 96-98 Civic 1.6L owner can install it without a custom calibration. Compared with a generic universal cold-air kit, this is a model-specific design, which matters in tight engine bays where fitment is often the problem. Opinions on user forums vary on how much seat-of-the-pants gain these Civics see, so the throttle-induced intake note is the upgrade most owners notice first. Searching for a 1996-1998 Civic EX 1.6L short ram intake, a no-tune-required intake, or a polished mandrel-bent intake for a 96-98 Civic HX or EL will bring up this kit.
Installation is a bolt-on job, but it is not a plug-and-play swap. Remove the factory airbox, disconnect the MAF harness, and swap in the included tube and hoses. Owners on user forums warn that coolant can seep out when the stock hoses come off, so have replacement hose clamps and coolant on hand. Disconnect the battery before you start, and after reassembly, run the engine for several minutes so the ECU can relearn the sensor, which helps prevent a lingering check engine light. Owners on user forums report roughly 45 minutes for a comparable short ram swap on a Civic, so plan for an afternoon if this is your first intake.
The manufacturer states the kit provides power gains while maintaining A/F ratios with no additional tuning. Owners on user forums still recommend running the engine after installation so the ECU can adjust to the new airflow reading.
The manufacturer lists direct fit for the 1996, 1997, and 1998 Honda Civic EL, EX, and HX with the 1.6L L4 engine. Confirm your model year, trim, and engine against the manufacturer's fitment list before ordering.
Expect a moderate DIY job. The manufacturer's install manuals for its intakes note that installation requires some mechanical skill and recommend a qualified mechanic if you are unsure. Gather basic sockets, a flathead screwdriver, and pliers for the hose clamps. Work only on a cool engine, since the manufacturer warns that hot engine components can cause serious burns. Disconnect the battery before you begin, label the MAF harness and breather hose so they reconnect correctly, and keep the factory airbox in case you want to revert. Dry-fit the tube before tightening any clamps to confirm the filter clears the radiator support and the hoses seat fully.
