Skunk2's all-new DBW throttle body adapter now offers 06-11 Honda Civic Si enthusiasts even more flexibility. Manufactured out of 6061-T6 billet aluminum, 06-11 Honda Civic Si throttle bodys can be bolted onto the new Ultra Race Series intake manifold. Enthusiasts now have a few options for throttle bodies. Each unique, CNC-machined and hard-anodized throttle body adapter features 74mm opening, recessed holes for easy adaptation, and all necessary mounting hardware is included with each adapter, making for an easy installation.