Skunk2’s Pro Series Throttle Bodies are designed to be used with factory intake manifolds as well as Skunk2’s Pro Series Intake Manifolds for bolt-on horsepower and torque gains by optimizing engine airflow. Skunk2’s Pro Series Throttle Bodies are CNC-machined from forged, billet 6061-T6 aluminum and hard anodized for durability and feature significantly larger bores, which result in significant horsepower gains throughout the powerband on naturally aspirated applications and even more on forced induction ones.