Holley - DUAL FUEL INJECTOR LO-RAM EFI INTAKE MANIFOLD KIT GM LS1/LS2/LS6 (300-624BK)The Holley LS1 2 6 Lo Ram intake manifold kits are designed for GM LS Gen III and IV engines equipped with GM LS1 2 6 (cathedral port) cylinder heads. These intake manifold and rail kits will work with OE (Original Equipment) or aftermarket cylinder heads. The 300 624(satin) & 300 624BK(black) intake manifold kit provides two injectors per cylinder for hi volume fuel demands, flexible fuel supply strategies, and dual fuel capability. The short runner,