FAST 54104 Electronic 102MM Throttle Body for GM LSFeatures & Benefits: 102mm bore for increased airflow Designed specifically for high performance drive by wire applications Anodized satin black for excellent aesthetics Clean sheet design by our engineers with an emphasis on safety and performance Works w OEM Gen IV GM ECUs including L76, L77, L99, LS3, or LS7 and most aftermarket ECUs implementing stock DBW control strategies The new FAST GM LS 102mm Big Mouth Electronic Throttle Body is designed to