A high performance throttle body is a must if you want a throttle response so sharp it will be only second to the reaction of a skilled driver. As the throttle body is a gateway to the engine's power producing cycle, a high performance throttle body not only allows you to minimize the delay between drivers input and response of the system, but also to extract even more performance out of other engine mods. BLOX Racing V2 billet throttle bodies are manufactured from precision machined AL6061 aluminum alloy and are designed for B/D/F/H Series engines. The larger bore sizes provide increased incoming airflow which results in a sharp throttle response and helps develop additional usable horsepower and torque. These high performance throttle bodies come in a range of bore sizes: 70mm / 72mm / 74mm / 76mm and are available in silver or black anodized. All necessary hardware is included.