Before I get much further it's time to address this little piece. This is the rubber gasket that mates the throttle body to the fuel metering assembly. It is NLA and there is no xref. In a stock application it's fairly reliable, but the piping on the BAE leaves it unsupported (the Island kit got this right and included additional support). Since I do not want an unmetered air + turbo situation, the plan is to urethane fill it for added strength.