Increase the horsepower and throttle response of your vehicle's engine with a K&N Typhoon intake system. K&N has been at the forefront of the performance industry for more than three decades, producing the most widely-used filters in the professional motorsports industry. All K&N products are tested by independent labs to verify the increases in power and performance they provide.

Designed to replace the air box, filter, and inlet tract in compact sports cars, aluminum Typhoon intakes improve performance by increasing airflow to your engine. Three types are available:

  • short-ram intakes (pulls air from inside the engine compartment);
  • cold-air intakes (pulls air from outside the engine compartment);
  • complete cold-air intake systems (can be changed from cold air to short ram use for the winter months).

This Typhoon short ram intake with its wrinkle red finish is engineered to replace the factory air box of your 2004-up Subaru Impreza WRX STi. The Filtercharger® — its washable, reusable filter element — allows for the virtually unrestricted flow of cooler air to your engine. This results in improved performance — performance you can feel every time you step on the accelerator. The fluid, dynamic design also smooths out and straightens airflow — air moving in a straight line is more easily assimilated by your engine than the turbulent air typically sent by factory systems.

The Typhoon intake comes with comprehensive installation instructions — and you might be surprised how easy it is to install. To ensure that this Typhoon intake will work with your vehicle, click on "What Fits My Car?" and enter its year, make, and model in our Vehicle Selector (if you haven't already). You can also call a Sales Advisor at 1-888-955-6000.

Important Note: K&N intakes work with your vehicle's factory computer emissions controls, and they're street legal in most states. Call K&N at 1-800-858-3333 to make sure this model has been approved for use in your state. These intakes are so effective, they're backed by K&N's impressive 10-year, million-mile limited warranty.

Hands-on research

What's in the box?

Download owner's manual

  • 1 Filtercharger (part #RP-5113)
  • One #80 hose clamp
  • One #350 adapter
  • One 32" edge trim
  • Two 1/16" neoprene gaskets
  • 1 Heat shield
  • Two M4 x 8mm bolts
  • 1 Silver turbo inlet tube
  • Four 6mm wave washers
  • Four M6 x 20mm hex bolts
  • 1 Heat insulation plate
  • One 9/64 Allen wrench
  • Two #300V hose clamps
  • One 2" black hose (2-3/4" inner diameter)
  • Installation Instructions
  • Warranty/Cleaning Instructions sheet
  • Two 3-1/2" x 1-3/8" "K&N High-Flow Air Filters" stickers

Product Research


Overview: The K&N Typhoon Air Intake System is a free-flowing mandrel-bent aluminum tube induction system designed to fit many sport compact performance vehicles. Each kit is proven on a rear-wheel dynamometer to increase horsepower and torque. Typhoon Air Intake Systems come in one of three designs; cold air intakes (CA), short ram intakes (SR), or complete cold air (CCA) intakes - which can be configured as either a cold air intake or a short ram intake. The K&N Typhoon Air Intake Systems are available in an assortment of powder coated colors and polished aluminum finishes. The Typhoon Air Intake System comes with an oversized high-flow conical air filter designed to provide increased surface area and dust capacity. This extra surface area provides even more airflow at lower restriction than a standard K&N O/E replacement filter that is limited to the size of the factory air box. The oversized air filter also captures more dirt increasing the service life before a cleaning is required (up to 100,000 miles).

Note: Some Typhoon Air Intake Systems are not legal for use in California and other states adopting California emission standards, while others are CARB exempt and 50 state legal.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

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