Skunk2 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 and Alpha Series Throttle Bodies are manufactured from the finest materials 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.