This throttle body adapter is great for Honda K - series engine enthusiasts and those who build engines. You can use it when you want to use the RBC intake manifold but still keep the drive - by - cable operation. It allows you to attach a BLOX Racing billet K - series or the OEM K20A2 throttle body to the RBC intake manifold. There aren't specific size or weight details given, but it's designed to fit well and provide better throttle response and intake airflow for your engine.