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HP EFI ECU & Harness Kits

Looking for a plug and play kit for your GM LS engine? The HP ECU allows you to accurately control...
Holley EFI Part #: GVMR_550-607
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$2,981.95 $2,981.95
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HP EFI ECU & Harness Kits

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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!

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