Injen's polished IS1555P is a short ram intake sized for the 1999–2000 Civic EL, EX and HX with the 1.6L four-cylinder, and the manufacturer says it runs without a tune. The tube is T6-6061 aluminum, mandrel-bent for a smooth airflow path, and the kit includes a serviceable SuperNano-Web dry filter that can be cleaned and reused. Compared with the factory airbox, the shorter inlet is designed to keep air/fuel ratios safe across the powerband, and the limited lifetime warranty covers the long-term purchase. Built to fit the 1999-2000 Honda Civic EL L4-1.6L and more, no tune required! The soul of this intake it is our mandrel-bent aluminum air intake tube that provides a smooth uninterrupted path for highly efficient airflow. Injen maintains safe Air fuel (A/F) ratios throughout the powerband. The kit also includes a fully serviceable Injen SuperNano-Web dry air filter.
The install takes place in the stock airbox location, and the manufacturer's general install sheets say it requires some mechanical skill and recommend a qualified mechanic if you are unsure. Owners on user forums describe 99–00 Civic short ram swaps as straightforward once the factory airbox is removed, and they stress disconnecting the battery before you start. Before buying for a California-registered car, check the smog-exemption status: the manufacturer's CARB list assigns D-476-2 to this part. Finally, the manufacturer recommends rechecking the intake's alignment and clearance after installation. Installation DOES require some mechanical skills. A qualified mechanic is always recommended. Got it installed no problem. Easy. IS1555P · 1999-2000 · Civic Ex, Hx, EL(Canada) · 1.6L 4 cyl. · Dyno-Tuned air intake system with web nano-fiber dry filter · D-476-2
The manufacturer states that this intake is designed to run with no additional tuning.
The manufacturer's fitment listing covers the 1999–2000 Civic EL, EX and HX with the 1.6L L4 and does not list the Si. Confirm fitment with the manufacturer before ordering for a Si.
The manufacturer's CARB list shows executive order D-476-2 for this part. Confirm current status with the manufacturer before relying on it for a California-registered vehicle.
Plan on a bolt-on job rather than a modification. The manufacturer's install sheet for another Civic application lists a 10mm ratchet and socket, an 8mm nut driver, an Allen key, and flat and Phillips screwdrivers. Its instructions say not to work on a hot engine and to disconnect the battery first, then reconnect it before starting. Remove the stock airbox, transfer the MAF sensor to the new tube, and align the intake for clearance. Owners on user forums warn that the crankcase breather hose should stay connected rather than being capped, because the stock hose returns oil vapor to the intake. TOOLS REQUIRED 10mm Ratchet & Socket · 8mm nut driver · Allen key · Flat Blade Screwdriver · Phillips Screwdriver Do not attempt to install the intake system while the engine is hot. DISCONNECT BATTERY BEFORE INSTALLATION In stock form it relieves the pressure in the head and circulates any oil back into the motor through the intake.
