The LS1 was rated at 350 hp (260 kW) and 365 lb·ft (495 N·m) since 2001 (LS6 Intake), 1997-2000 350 lb·ft (470 N·m) in North America, depending on the application.^[2] The LS1 was used in the Corvette from 97-04. It was also used in GM F-Body cars with a rating of 305HP - 325HP. In Australia, continuous modifications were made to the LS1 engine throughout its lifetime, reaching 382 bhp (285 kW) in the HSV's YII series, and a Callaway modified version named "C4B" was fitted to HSV GTS models producing 402 bhp (300 kW).

Holley HP EFI &Harness for use with mechanical cable throttle bodys includes AIT sensor relays for electric fans & fuel pump.  Harness is 5 wire hook up to chassis (12v+,ignition, tach, fuel pump , electric fan

Features

• ·     Plug and Play control of factory GM 24x and 58x LSx engines
• ·     Internal data-logging standard with a huge 2GB of memory
• ·     4 Stage progressive nitrous control
• ·     Turbo boost control
• ·     Integrated water/methanol injection control
• ·     Self-tuning fuel table strategy greatly simplifies tuning process
• ·     Individual cylinder fuel and spark control allows you to unlock your engine’s potential
• ·     Works with 4, 6, 8 cylinder engines
• ·     Unique lb/hr based fueling strategy greatly simplifies and commonizes tuning
• ·     Advanced idle, closed loop, and enrichment strategies allow for very stable operation
• ·     ECU is fully potted and can be mounted in the engine compartment or interior
• ·     Sealed automotive and marine grade connectors
• ·     Allows for use of common OEM sensors as well as customer sensor calibration input
• ·     1-5 Bar MAP sensor capability
• ·     Two channel knock control sensor Inputs for both one or two wire knock sensors
• ·     Dedicated fuel and oil pressure inputs
• ·     Controls both stepper and PWM Idle Air Control (IAC) motors
• ·     Speed density, Alpha-N, or combination fueling strategies
• ·     4 Programmable high or low Pulse Width Modulated (PWM) outputs and 4 fully configurable inputs can be configured for use
• ·     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 tubing