Holley HP EFI ECU and Harness Kits 550-602N studfix 1x Transmission Cooling Line C

1x Transmission Cooling Line C

The system includes all hardware necessary for installation and provides adequate clearance for substantially lowered vehicles

Utilizing cool shell technology to minimize radiant heat from the muffler body

EK-61-855637-1

Holley HP EFI ECU and Harness Kits 550-602N studfix 1x Transmission Cooling Line CHP ECU AND HARNESS, LS1 6, NTK Looking for a plug and play kit for your GM LS engine? The HP ECU allows you to accurately control the fuel and ignition of your engine plus much more! Got a stock LS engine? Simply download a base map and you're on your way. Got a turbocharged, nitrous fed LS engine on water meth? This HP EFI kit can control that too! Stop reflashing your factory ECU every time you make a performance modification. Get Holley EFI today!