FAST Ignition Distributor SBC/BBC Dual w/ Slip Collar Xdi EZ-RunFAST? XDi EZ Run? Distributors come in a convenient package that saves time and space as they do not require an ignition box to fire the coil, while a standard size cap offers more firewall and manifold clearance than HEI style distributors. In addition, each billet distributor features mechanical and vacuum advance for easy setup, along with a built in electronic module that can directly fire an ignition coil, plus provide accurate, dependable and