The new IPD 997.1 GT2 Plenum is offered in one single 74mm version which utilizes the factory 74mm throttle body. The already explosive power of the 997.1 GT2 can be further increased with the new 997.1 GT2 IPD Intake Plenum. The patented IPD Plenum design works exceptionally well with all forced induction applications and the GT2 is no exception. Power and torque increases provided by the IPD plenum are impressive and stay well above all factory power curves from launch to redline. Max horsepower is over 30 at the wheels while the torque is slightly stronger coming in around 35 at the wheels. Maximum power increases take place in the midrange where it's most needed, most critical and most enjoyed.