The Injen IS1910BLK is a short ram intake built for the 1989–1990 Nissan 240SX with the 2.4L four-cylinder. Injen says it is built to fit the 1989-1990 Nissan 240SX L4-2.4L with no tune required. The core of the kit is mandrel-bent T6-6061 aluminum tubing feeding a washable SuperNano-Web dry filter, finished in black. Injen notes that the short ram design will fit directly into even the tightest of engine bays while improving performance.
Compared with the stock airbox, the case for this kit rests on airflow and durability. The manufacturer describes its smooth mandrel-bent tubing as removing restrictions, and states that power gains are provided while maintaining A/F ratios with no additional tuning. Injen's published dyno figures vary between its own pages, so confirm the current numbers with the manufacturer before relying on them. The kit also ships with a Limited Lifetime Warranty, and the filter can be replaced using part number X-1014-BB, which makes long-term ownership cheaper than buying a new intake.
No. User forums note that the 12-valve 1989–1990 car uses the IS1910 kit, while the 16-valve 1995–1996 car requires the separate IS1900 kit.
The manufacturer states that the kit is designed to need no tune and to keep air-fuel ratios in a safe range.
Owners on user forums report that a hood closed with force can strike the MAF sensor and disturb idle. They also point to disconnected vacuum lines as a common cause of idle problems after the swap, so check those lines before assuming a fault with the intake.
The manufacturer's install sheet for the closely related 1995–1996 IS1900 kit states that installation requires some mechanical skill and should not be attempted on a hot engine. It also warns that the radiator fluid line may need to be moved out of the way. Forum walkthroughs describe a swap that takes roughly 40–45 minutes for someone with basic mechanical skills. The process involves removing the factory filter, unplugging the MAF sensor, reattaching the crankcase vent hose, installing a MAF adapter plate, and securing the new intake with its hose clamps. Confirm the exact tool list and steps against the instruction sheet packed with your kit, since the IS1900 sheet is for a different car.
