Description Vehicle Fitment & Emissions Installation Instructions If you want to further increase your Volant CAI kit effectiveness, add on the Volant Cool Air Scoop. Customers using the Volant CAI kit with the scoop report 2-4 MPG improvements in fuel economy, as well as dyno-proven horsepower and torque increases. Volant is the first air intake company to properly apply a functioning Cool Air Scoop to a sealed air intake box. Throttle Body Spacer Part # 728640 Air Intake, Scoop Combo Part # 18640 , 38140 Scoop fits to Volant Closed Box Air Intake Part Numbers 18427 (2.7L L4) , 18540 (4.0L V6) for the following vehicle combinations: 2005-2015 Toyota Tacoma 2.7L L4 2005-2015 Toyota Tacoma 4.0L V6 Instruction Sheets for Part 38640