AEM Wrinkle Red Cold Air Intake Subaru STI 2018 NGK Plugs a resonator

a resonator

Part #: FFC15SBIMP

and will provide exceptional idle and cruise behavior under these conditions

They just make things feel better

AEM Wrinkle Red Cold Air Intake Subaru STI 2018 NGK Plugs a resonatorThe AEM 21 836WR Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicle's restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno tested to fit specific Subaru WRX STI models. Air enters the system through an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration and performance. The air filter is located in the original air