Holley HP 550-602 ECU & Wiring Harness

Looking for a plug and play kit for your GM LS1/LS6 engine? The Holley HP 550-602 ECU & Wiring Harness allows you to accurately control the fuel and ignition of your engine! 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 re-flashing your factory ECU every time you make a performance modification. Get Holley EFI today!

Holley HP 550-602 ECU Features:

• Simple Installation - Plug and Play control of GM LS1/LS6 engines. Just plug the harness into your factory sensors, wire the power and grounds. You are now ready to take complete control of your LS engine!
• Provides significantly more functionality than OEM or other competitive ECUs. From boost control, nitrous control, and water/meth injection, to a host of additional inputs and outputs to control fans, pumps as well as relays
• Allows use of common OEM sensors as well as customer sensor calibration input 
• Easy To Use! Laptop programmable ECU includes a variety of base maps to have you hitting the cruise or track in no time
• Ideal For Everything, from stock 5.3L engine swaps or 3,000+ HP race cars! Need a simple and powerful ECU and harness solution? This is it!
• Industry Leading Self Tuning Fuel Strategy - means less time tuning and more time enjoying the power of your LS vehicle
• Kit includes ECU, harness, communication cable, software and Bosch wideband 02 sensor. Designed for use with GM LS1/LS6 engines with factory GM coils and a 24 tooth crank sensor
• Fully potted to mount either in the engine compartment or interior
• Sealed automotive and marine grade connectors
• 1-5 Bar MAP sensor capability
• Optional plug and play hand-held programmer, 5.7" touchscreen and digital gauges are available for both ultimate control and vehicle monitoring
• ECU is certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for both Ignition Protection and Fire Resistance