Designed to increase HP and Acceleration
Engineered to Specific Vehicle Design
Easy to Install, Usually in 90 minutes or less!
Lasts up to 100,000 Miles Before Service is Required (depending on driving conditions)
Million Mile Limited Warranty
Replaces OEM Filter and Air Box
Air Filter is Washable and Reusable
Impreza WRX and STI 2001-2007 Bugeye, Blobeye and Hawkeye
The K&N 57i induction Kits are a great way and in many cases the only way to maximize airflow and engine performance. They will replace the factory air box providing both High-Flow air filter technology and a larger air filter size. This winning combination will increase horsepower and sound great too.
BREAK OUT OF THE FACTORY AIR BOX 57i Series Intake Kits are specifically designed for each different vehicle and will free your car from the size restriction that comes with the factory air box. These economical kits can take a variety of different forms based on vehicle characteristics and available space under the hood.
Each kit is designed to provide power throughout the RPM range.
Gen I’s take advantage of the added airflow provided by an oversized air filter released from the restrictive factory air box..
These kits bring engine airflow out of the factory box by providing a large size open-air conical or round High-Flow Air Filter. The extra surface area of these open-air air filters provide even more airflow at lower restriction than a K&N O/E replacement filter which is always limited to the size of the factory air box.
The larger air filter also captures and holds more dirt increasing its service life before a cleaning is required (up to 100,000 miles). The filter is then either directly attached to the engine carburetor or throttle body or indirectly through a tube assembly running from the filter to the engine.
All adaptors are made from high quality materials such as steel, aluminum, silicon or reinforced nylon and ensure long life.
We recommend datalogging of your Impreza following fitment to ensure correct running, or an ECU remap following fitment. Contact us for further details.
Part 57-0626 Product Specifications
Replacement Filter RC-70031
Air Filter Color Red
Air Filter Material Cotton Gauze
Air Filter Outlet Shape Round
Clamps Included 1
Clamp Material Stainless Steel
Clamp Style Regular
Couplers Included None
Type Gen I
Product Style 57i Series International Kits
Air Filter Height 6.344 in (161 mm)
Intake Pipe Color / Finish Black
Intake Pipe Material Aluminum
Street Legal In All US States No
TUV Approved (Europe) No
Weight 2.9 lb (1.3 kg)
Product Box Height 9 in (229 mm)
Product Box Length 9 in (229 mm)
Product Box Width 9 in (229 mm)
California Restricted Not legal for sale or use in California