The Injen IS1910P is a polished short ram intake for the 12-valve Nissan 240SX KA24E. The KA24E ran from 1989 to 1990 in this chassis, and the manufacturer says the system is built for the 1989-1990 2.4L four-cylinder 240SX and requires no tune. The tube is mandrel-bent aluminum that gives the air a smooth, uninterrupted path. For buyers comparing it with a stock airbox, the manufacturer cites dyno-proven gains of up to 7.6 hp and 10.6 lb-ft of torque, though published figures vary between sources.
The main reason to choose this over a cheap drop-in filter is the tube itself. The short ram design removes the factory resonators and air box and replaces them with an open filter element. The kit's serviceable SuperNano-Web dry filter offers extra media area, and the manufacturer's limited lifetime warranty backs the purchase. Keep expectations realistic: owners on user forums report that a short ram still draws some warm engine-bay air, so it is not a true cold air intake. Search terms like "240SX KA24E short ram intake," "S13 no tune intake," and "1990 240SX 12 valve intake" match this part.
For DIY, the manufacturer provides installation instructions as a downloadable document. Injen's install sheets for other intake kits call for disconnecting the battery before installation and warn against working on the engine while it is hot. Bolt-on work with basic hand tools is the expected scope, though the manufacturer's sheets for other kits note that installation requires some mechanical skill.
The manufacturer states that this intake is built to run without a tune on the 1989-1990 2.4L 240SX.
The manufacturer lists fitment for the 1989-1990 2.4L four-cylinder 240SX only. Some listings show broader year ranges, so confirm fitment with the manufacturer before ordering.
User forums describe short ram intakes as drawing warm engine-bay air, so this is a short ram design rather than a true cold air intake.
Plan on basic hand tools and the manufacturer's installation PDF. Disconnect the battery first, let the engine cool, and check that the tube clears the radiator area and other components after installation. Owners on user forums suggest checking the tube by hand after a drive to see how much heat it picks up from the radiator area.
