Part Number CTR-21-960 Are you switching to an electric fuel pump? If so, then you're going to need one of these Canton Racing billet aluminum mechanical fuel pump block-off plates. They are designed to block off the fuel pump opening whenever a mechanical fuel pump is not used. The plates are manufactured from 1/4 in. billet aluminum, are black anodized to be durable and long-lasting, and include stainless steel mounting hardware. Canton Racing billet aluminum mechanical fuel pump block-off plates are also available with a welded-on -10 AN male fitting that allows a vacuum pump or drainback valve to be connected.