Racepak The Vantage EFI Interface Module from Racepak streams CAN-based data from aftermarket EFI systems to the Vantage CL1 system. This gives the ability to monitor and record up to ten user-defined channels from the EFI system. Over 20 EFI Systems are compatible with the Vantage CL1, including Holley, Haltech, AEM, Motec, MSD, Link, Fuel Tech and many more. The EFI Interface Module attaches to the CAN connector on the CL1 data box, and a 12 volt power source. It also requires a brand-specific interface cable, sold separately, based on the type of EFI system used.