THIS IS THE PREFERRED ENGINE CONTROL MANAGEMENT SYSTEM FOR THE ZL1 SPEED SHOP ON ANY SERIOUS PERFORMANCE ENGINES. IT DELETES THE RESTRICTIVE MASS AIR FLOW SENSORS PRESENT ON MANY APPLICATIONS AND HAS SELF LEARNING CAPABILITIES THAT MAKE TUNING MUCH SAFER, EASIER, AND FASTER OVER, LETS SAY, A STOCK GM ECU. Note: Holley electronic gauges or other types of gauges must be used with this ECU kit in your gauge cluster-not compatible with GM electronic stock gauge cluster. Contact us for help with gauge selection. 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! Features: Simple Installation - Plug and Play control of GM LS2/LS3/LS7 engines. Just plug the harness into your factory sensors, wire the power and grounds and you are ready to take complete control of your LS engine More Functionality - Provides significantly more functionality than OEM or other competitive ECUs (boost control, nitrous control, water/meth injection, plus a host of additional inputs and outputs to control fans, pumps, relays etc.) Easy To Use - Laptop programmable ECU includes a variety of base maps that will have you hitting the cruise or track in no time Ideal For Everything - including stock 5.3L engine swaps or all out, 3,000+ horsepower race cars that need a simple and powerful ECU and harness solution 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, USCAR (EV6 Style) injector connectors, and Bosch wideband O2 sensor, designed to be used with GM LS2/LS3/LS7 engines with factory GM coils and a 58 tooth crank sensor ECU is fully potted and can be mounted 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" touch screen and digital gauges are available for ultimate control and vehicle monitoring ECU is certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance For a full list of advanced features such as boost, nitrous, water/meth, individual cylinder control and more click the document icon under the product image!