System takes cool air from behind and below the headlight area (rather than hot air from the engine compartment) to supply engine with cooler- denser air to increase horsepower and improve cooling Designed to work with the factory ECU and emissions system Features reusable TRD high-flow conical air filter with custom-calibrated filter service gauge that provides visual indication when filter needs servicing Dyno-tested to deliver an increase in both horsepower and torque for superior acceleration and greater pulling power Tested according to Scions stringent performance standards Emissions legal in all 50 states.

System takes cool air from behind and below the headlight area (rather than hot air from the engine compartment) to supply engine with cooler- denser air to increase horsepower and improve cooling Designed to work with the factory ECU and emissions system Features reusable TRD high-flow conical air filter with custom-calibrated filter service gauge that provides visual indication when filter needs servicing Dyno-tested to deliver an increase in both horsepower and torque for superior acceleration and greater pulling power Tested according to Scions stringent performance standards Emissions legal in all 50 states.