The K&N 57 Series FIPK cold-air intake replaces the factory air box and intake tube on 2000–2004 Toyota Tacoma and 4Runner models with the 2.4L or 2.7L L4. The core is a roto-molded, cross-linked HDPE tube that feeds the throttle body, paired with a washable red oiled-cotton High-Flow filter and a custom heat shield that keeps intake air away from engine-bay heat. It is a practical choice for drivers searching for a 2000-2004 Tacoma 2.4L cold air intake or a 4Runner 2.7L CAI.
Buy this over a stock box if you want a measurable gain and fewer filter services. The manufacturer estimates roughly 6.19 HP at 4200 RPM and 7.7 lb-ft of torque, and rates the filter for up to 100,000 miles of normal highway driving between cleanings. Owners on user forums report mixed results: some describe sharper throttle response on 2.7L trucks, another reported a small dyno loss, and a common warning is to keep the oiled filter lightly oiled so residue does not foul the mass airflow sensor. Treat the horsepower figure as an estimate, since real gains depend on the rest of your setup.
The manufacturer lists the kit for 2000–2004 Toyota Tacoma and 4Runner models with the L4 2.4L or 2.7L engine. Details vary across sources, so confirm your exact engine and model year with the manufacturer before ordering.
The manufacturer recommends that customers do not discard the factory air intake.
The manufacturer says the filter typically needs cleaning only about every 100,000 miles under normal highway driving conditions. The filter is washable and reusable, and the manufacturer lists RU-1037 as the replacement filter.
The manufacturer lists CARB EO number D-269-28 and states the kit is legal for use in all 50 states.
The manufacturer says a typical installation takes 60 minutes or less with simple hand tools. The steps include disconnecting the mass airflow sensor connector, loosening the two hose clamps on the intake hose, removing the three bolts that hold the air cleaner assembly, removing the two nuts on the resonator, disconnecting an idle air vent line if your truck has one, and loosening the throttle body clamp. Use only the supplied hardware, because the manufacturer warns that skipping it can damage the tube, throttle body, or engine. The kit is not designed for vehicles with a body lift. Owners on user forums describe the job as straightforward, but confirm the full tool list with the manufacturer's instruction sheet before you start.
