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 K-series dual-pattern throttle bodies are manufactured from precision machined billet aluminum and specifically designed for the L15B7 engine, to eliminate the restrictive OEM throttle body and significantly increase throttle response and optimize power output. Available in 56mm and 58mm bore sizes. Throttle bodies include drive by wire motor and mounting hardware. Factory O-ring gasket is reused. For Off-Road use only.