The dyno-tested TRD performance air intake system replaces the fresh air inlet duct- upper half of OE air box- air filter and inlet hose assembly. Uses a unique Intake Flow Accelerator (IFA) to smooth and accelerate air flow into the system and features an injection molded- larger volume upper air box that houses a reusable TRD high flow conical air filter. Custom-calibrated filter service gauge provides visual indication of when the filter needs servicing.