323 Holley HP EFI Controller - Features Continued: 4 Stage nitrous oxide control Fully featured nitrous control eliminates the need for a separate nitrous controller device Can be configured “Wet” or “Dry” with closed loop feedback Progressive control based on time, RPM, or boost, requires part # 554-111 Lean or rich safety cutoff Full timing retard/control configurability per stage based on RPM or time Integrated Water/Methanol injection control Uses Holley Water/Meth solenoids specially designed and calibrated for use with this EFI system to allow the user to enter Water/Meth flow as a percentage of fuel injector flow for Water/Meth RST #0570-E $1120.95 Holley HP EFI Controller – With Harness 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 Kit includes ECU, harness, communication cable, software, Jetronic/Minitimer (Bosch 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 RST #0570-K $1766.95 MSD Carbureted LS Engine Ignition Controller To control ignition timing on Carbureted LS engines without EFI. The controller allows you to map a timing advance curve with MSD’s easy-to- use Pro-Data+ software. Other programmable features include a two- step rev limiter, a vacuum advance curve for cruising economy and even a step retard in case you want to add a little nitrous to the mix. These compact ignition controllers fit with matching factory connectors for a direct installation. Only a handful of connections are required; the coils, crank sensor, MAP sensor and the cam sensor. You’ll have your carb’ed LSX running in no time! Features: Runs a carbureted LS2 engine without complicated EFI hardware Map a timing curve using Pro-Data+ software Programmable two-step rev limiter, vacuum advance curve and step retard Direct plug-in to factory components Programmable via a PC through MSD's Pro-Data+ software. Does NOT control fuel 58-Tooth RST #0560-C $364.95 24-Tooth RST #0561-C $364.95 Engine Accessories