LS3 376CI 525HP Crate Engine

Estimated Price $13,995

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Our LS3 376CI 525HP crate engine package can be dyno tested and tuned ready for installation. This build features an aluminum LS3 6 bolt block. Comes ready to install with the Muscle Car oil pan. We can also assist you in picking out the correct motor mount and header combo that will fit your hot rod. If you are in need of a serpentine pulley kit complete with components or a transmission we can assist you with that as well. All our LS series crate engines can be custom painted customers choice of color.

  • Fully Machined Aluminum LS3 Block With 6-bolt cross-bolted main caps
  • Nodular Iron Crankshaft 3.62 Stroke
  • Powdered Metal Connecting Rods 6.125”
  • Hypereutectic Aluminum Pistons
  • Complete Assembly Internally Balanced
  • Hydraulic Roller Camshaft
  • Hydraulic Roller Lifters
  • Timing chain set
  • Oil pump
  • Aluminum LS3 Rectangular Port Cylinder Head
  • 2.165 Intake Valves
  • 1.590 Exhaust Valves
  • GM Performance Valve Springs
  • Rocker Arms 1.7:1
  • Pushrods
  • Main bolts
  • Head bolts
  • Aluminum Timing And Rear Cover
  • Aluminum Valley Tray
  • Aluminum Oil Pan (Muscle Car)
  • Fabricated Aluminum Intake Manifold (Black)
  • Fuel Injectors
  • Fuel Rails
  • DBC Throttle Body (Black)
  • Aluminum LS Valve Covers (Black)
  • Balancer
  • LS3 Style Coils
  • Coil Harness
  • 8mm Ignition Wires
  • Holley Terminator X ECU
  • Engine Wiring Harness
  • Fuel Injector Harness
  • Wide Ban O2 Sensor
  • Intake Air Temperature Sensor
  • Crankshaft Position Sensor
  • Camshaft Position Sensor
  • Engine Coolant Temperature Sensor
  • Manifold Air Pressure Sensor
  • Oil And Filter
  • Spark Plugs
  • Engines are photo documented during the building process
  • 2 Year Unlimited Miles Warranty


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Pulley Systems

LS Alt Only Pulley Kit

LS Alt Only Pulley Kit

This system includes the following items:

  • Chrome 140 Amp Alternator
  • Polished Alternator Pulley
  • Polished Crankshaft Pulley
  • Polished Water Pump Pulley
  • Polished Aluminum Brackets With Fan & Nose Cover
  • 8 Rib Serpentine Belt
  • Installed on your engine

Add $1,675

LS Alt/PS Pulley Kit

LS Alt/PS Pulley Kit

This system includes the following items:

  • Chrome 140 Amp Alternator
  • GM Type 2 Power Steering Pump With Reservoir
  • Polished Alternator Pulley
  • Polished Crankshaft Pulley
  • Polished Water Pump Pulley
  • Polished Aluminum Brackets With Fan & Nose Cover
  • Polished Idler Pulley
  • Spring Loaded Belt Tensioner
  • 8 Rib Serpentine Belt
  • Installed On Your Engine

Add $1,875

LS Alt/PS And AC Pulley Kit

LS Alt/PS And AC Pulley Kit

This system includes the following items:

  • Chrome Plated 140 Amp Alternator
  • GM Type 2 Power Steering Pump With Reservoir
  • Chrome Plated AC Compressor
  • Polished Alternator Pulley
  • Polished Crankshaft Pulley
  • Polished Water Pump Pulley
  • Polished Aluminum Brackets With Fan & Nose Cover
  • Spring Loaded Belt Tensioner
  • 8 Rib Serpentine Belt
  • Installed on your engine

Add $2,300


Dyno Testing

Have your new crate engine Dyno tested!

Have your new crate engine Dyno tested!

Proformance Unlimited measures over 30 parameters that are monitored and logged to the computer during each engine test. A complete printout, including graphs.

We tune your engine on the dyno for maximum power. No more endless trial and error methods at the track are required. You see your results instantly! Dynamometer testing costs a fraction of what you have invested. Take the guesswork out of tuning - by dynoing !

This system includes the following items:

  • Your engine will be broken in under various load conditions
  • Tested in real world conditions through headers and mufflers
  • Precise horsepower and torque rating with graph and numerical print out
  • Induction system tuned for optimal performance
  • Dyno session video taped

Add $850


Dress Up

Custom Painted Engine

Custom Painted Engine

Have a custom painted car? Why not have a custom painted engine? Give us your paint code and we'll do the rest.

This system includes the following items:

  • Custom paint

Add $550


Fuel Delivery Systems

Holley EFI Terminator X Max ECU

Holley EFI Terminator X Max ECU

UPGRADE – Your New Proformance Unlimited Crate Engine To Come With A Holley Terminator X Max ECU.
**If you plan to run a DBW throttle body or an electronic controlled Transmission. This is a must have upgrade!**

This system includes the following items:

  • OEM (Original Equipment Manufacturer) injectors supported, with part numbers provided in the handheld wizard or software
  • Genuine Bosch LSU 4.9 Wideband Control (Will not work with LSU 4.2 Oxygen Sensors)
  • 8 Built-in multi-color diagnostic LED’s allow you to quickly identify a variety of potential system issues, such as a failed TPS (Throttle Position Sensor) Autoset, faulty crank or cam sensors, or potential oxygen sensor issues
  • Built in 1bar MAP (Manifold Air Pressure) sensor. On boosted applications, you can disable the internal MAP sensor, and utilize an external MAP sensor
  • 4 Inputs – 12v, Ground, 5v, and Frequency for things such as additional pressure sensors, activation triggers for nitrous activation, or a trans brake (fuel and oil pressure inputs are pre-terminated)
  • 4 Outputs – Ground, PWM – for accessories such as fans, boost control, nitrous control, IAC Kit, and more
  • GM LS and LT, Ford Coyote, and Mopar Gen V Drive-by Wire Throttle Body Control (Terminator X Max Only)
  • GM 4L60 and 4L80, and Ford 4R70W Transmission Control (Terminator X Max Only)
  • Boost Control – Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
  • Nitrous Control – Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
  • Advanced Tables – 4x 1D Tables, 1x 1D per Gear Table, 4x 2D Tables, 1x 2D per Gear Table
  • Free EFI Tuning Software for complete control of your Terminator X power plant

Add $550


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