21-836C AEM Cold Air Intake System, Subaru Impreza WRX STi 2.5l Turbo, '18

AEM® cold air intake systems are designed to increase horsepower and torque. The system includes an oversized AEM DRYFLOW® synthetic washable air filter, engineered to provide outstanding airflow, filtration, and performance, and also features a mandrel-bent aluminum intake tube and high quality hardware. The oversized, conical filter design allows you to go up to 100,000 miles between filter services under normal highway driving conditions. A custom heat shield helps protect intake air from the high temperature of your engine bay, and the factory fresh air duct attaches to the heat shield. The entire system can typically be installed in less than 90 minutes. Some intakes are not legal for sale or use on any pollution controlled motor vehicle in California. See the product specifications for CARB status on each part for a specific vehicle.

Specification:

Estimated Horsepower Gain*: 22.1 HP @ 6217 RPM
Replacement Filter: 21-2157D
Air Filter Color: Red
Air Filter Material: Non-woven Synthetic
Air Filter Outlet Shape: Round
Clamps Included: 3
Clamp Material: Stainless Steel
Clamp Style: Worm Gear
Couplers Included: 1
Product Style: AEM Cold Air Intake System
Intake Pipe Color / Finish: Gunmetal Gray
Intake Pipe Material: Aluminum
Street Legal In All US States: No
TUV Approved (Europe): No
Weight: 10 lb (4.5 kg)
Product Box Height: 12.25 in (311 mm)
Product Box Length: 20.25 in (514 mm)
Mounting Hardware Included: Not Required

*Horsepower gains based on similar vehicle dynamometer test. Results will vary.