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Unsurpassed quality you can trust
7000 Classic Series
2017-2019 GMC Sierra 2500 HD Base DIESEL Double Cab Pickup
2004-2011 Workhorse Custom Chassis W24
Supports up to 1900 horsepower
Holley EFI Wire Harness Kit - EFI Terminator I/O 1959991 Unsurpassed quality you can trustThis kit contains 4 extra input wires and 1 extra output wire that the base Terminator EFI harness does not contain. Holley is quickly becoming The New Standard In EFI! Holley's HP ECU is standard equipment on the 2013 2014 Chevrolet COPO Camaro and Holley's EFI throttle body powers every NASCAR Cup Series team. Top racers are making the switch to Holley EFI every day. Racers like Tom Bailey who set three new records and took the overall event win on
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