This aFe POWER 76mm Throttle Body and adapter kit improves engine air flow over the stock 65mm throttle body. The extra air flow will increase horsepower and throttle response. This kit will work with OEM or aFe cold air intakes. Performance gains will be more noticeable as more upgrades are added to the vehicle. All adapters are constructed from 6061-T6 billet aluminum and are precision machined for light weight, high strength, and perfect fit and finish. The Serrated/Swirl combination design creates intake turbulence in the combustion chamber which breaks up the fuel creating a more complete combustion cycle increasing horsepower, torque and improving throttle response. This aFe POWER 76mm throttle body kit uses all factory mounting locations providing stability and a hassle-free installation. All needed hardware is included with the kit. Idle will run high on some vehicles but will readjust once the ECU learns to properly control the idle (this can take up to 800 miles on some vehicles). aFe POWER Throttle Body Toyota 4Runner/FJ/Tacoma/Tundra 03-15 (1GR-FE Single VVT-i) Toyota 4Runner/FJ/Tacoma/Tundra 03-15 (1GR-FE Single VVT-i)