BBK Power Plus 62 millimeter Throttle Body for Jeep 4.0L for all BBK 1991-2003 Jeep 4.0L throttle bodies are designed to increase airflow and improve horsepower from between 7-12 HP depending on the vehicle and application. All BBK performance power plus series throttle bodies are CNC machined from high quality 356 aluminum castings to ensure perfect OEM quality and fit every time. Features like OEM die stamped throttle linkages, double sealed bearings, o ringed throttle shafts, make BBK throttle bodies the number one in performance and quality.