PLM Power Driven B-Series Throttle Body B18 B20PLM throttle bodies are designed to be used with factory intake manifolds as well as aftermarket Intake manifolds for bolt on horsepower and torque gains by optimizing engine airflow, all at a competitive price. The B Series 70mm throttle bodies are 10mm larger in diameter than the OEM 60mm Throttle body. The throttle bodies are precision die cast from high quality materials with an idle adjustment screws for fine tuning. Each Throttle Body features