Billet Metering Plate Kit - Designed for carburetors with center-pivot fuel bowls and no secondary metering block (most vacuum secondary carburetors). Replaces stock metering plate and has provision for main jets Allows tuning of fuel curve and performance without changing or drilling existing cast plates. Billet aluminum CNC machined and anodized red Comes with replacement gaskets. Replaces stock metering plate and has provision for main jets Allows tuning of fuel curve and performance without changing or drilling existing cast plates. Billet aluminum CNC machined and anodized red Comes with replacement gaskets.