As the throttle body and intake manifold are used to control the amount of air flowing to the engine‚¬€ž¢s combustion chamber, they are important elements of the intake system. Using Koso‚¬€ž¢s 34mm Throttle Body in conjunction with Koso's 30.5 to 34mm Intake Manifold (DP623001) will give a better air/fuel mixture for a quicker throttle response.