New Holley Small Block Chevy Multi-Port Power Pack kits are partially assembled and do not include an ECU, harness, fuel pump, injectors or sensor connectors. These kits are intended to be used in conjunction with a Holley HP or Dominator ECU. Holley EFI Power Pack kits can also be used with any aftermarket speed-density type ECU's that are designed for use with a multi-point system.
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