Blox Racing designed this adapter to allow RBC manifold users to enjoy the versatility of a B/D/H/F-series throttle body. There are a vast amount of aftermarket throttle bodies for these older motors, including Blox’s own Billet TB’s ranging from 66mm to 76mm bore sizes. This adapter can be used in a K-series swap where keeping the factory TPS is necessary, or alternatively, in a PRB/PRC to RBC conversion where drive-by-cable is preferred. 

Machined from 6061-T6 aluminum, this part is thick enough to be bored out further, if a TB larger than 68mm is required. It should be noted that throttle body bore should always be equal to or smaller than adapter/manifold bore.

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