95mm Genuine GM Throttle Body

The Smg Speed throttle body assembly, identified by GM part number 12669871 (also superseding 12740728), is a factory-original 95mm throttle body designed for the 2019 Corvette ZR1. It is frequently utilized as a performance upgrade for various Gen V LT engines, including LT1, L86, and LT2 applications, to increase intake airflow capacity. While this is a genuine GM part, it is not a direct bolt-on for all configurations. An adapter plate is required when installing this throttle body on LT1, L86, LT2, and other non-LT5 Gen V LT-based engine applications. Furthermore, custom tuning is required for proper operation when using this unit on LT1, LT4, or L86 engines to ensure correct engine performance and drivability. This unit features a 95mm bore diameter and is manufactured to stringent GM OEM standards, ensuring consistency and safety for performance-focused projects, such as street performance, naturally aspirated, or boosted combinations.