AEM Cold Air Intake System - Subaru WRX STI H4-2.5L F/I 18-21 (Wrinkle Red)

Description

50 State Legal. This part is legal for sale and use on Emissions Controlled Vehicles in all 50 states when used in accordance with the manufacturer's application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number: CARB EO: D-670-* (For Exact Vehicle Specific EO#, Contact AEM)

NOTE: Not for sale or street use in CA & CARB States. Check your state and local law requirements and regulations.

High flow metallic substrate catalytic converters, OBDII & 49 state compliant. Full stainless steel construction. Our test data shows that this cat flows 87% as well as a test pipe vs. 43% for the OEM Cat. Smog legal, high flow, no test pipe smell. You can have it all....

AEM Cold Air Intakes and Performance Air Intake Systems

A cold air intake system relocates the filter outside of the engine compartment to deliver cool air inlet temperatures. Cooler air carries more oxygen, which translates into a more intense explosion in the combustion chamber to create more horsepower and torque.

But that's only part of the power equation. Tuning the inlet pipe in length and diameter to match the engine's resonance helps move more air to the cylinders (think of your engine as a big air pump), and this tuning allows us to deliver large power gains. We also monitor fuel trim correction factors and all OBDII sensors during product development to eliminate leaning the engine out and/or throwing a check engine light.

- Improved Horsepower Gains
- Improved Throttle Response
- Enhanced Engine Sound
- DryFlow Oil-free Synthetic Filter Media
- Washable and Reusable Air Filter
- Up to 100,000 miles of use before cleaning needed
- Incredibly Quick and Easy to Clean
- Lifetime Limited Warranty