FAST 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 maintenance-free operation. A perfect choice for daily drivers muscle cars and street rods alike XDi EZ-Run Distributors are available for most domestic V8 applications.