Grassroots Performance LSX, Nissan, and BMW series of throttle body use the 4-bolt mount pattern. A simple proven design that increases airflow with a bigger opening, also known from 90mm to 102mm. Improved throttle response from 2500 rpm through redline. OEM fitment for Throttle Position Sensor (TPS) and Idle Air Control Sensor (IACS). Available in polished and black anodized.
More info at https://grassrootsparts.com.