High Performance Engines

Chevy LM7 5.3L 1999-2007 Truck Base Engine 385HP

Sale price Price $3,789.00 Regular price $4,195.00

This engine was designed to be a performance upgrade for a 1999-2007 Chevy Truck LM7 or LS swap in a hot rod. Expect big mid to upper end power, will have a noticeable idle. For optimal Performance you will need headers, chassis dyno tune and upgraded injectors. Cam Specs will come with the engine.

  • Horsepower: 385+
    Torque: 390+
    Block: GM 5.3L Iron LM7
    Bore/Stroke: Up to 3.809 x 3.622
    Year Range: 1999-2007
    Displacement: 323 C.I.D.
    Crankshaft: OEM GM 3.622" Stroke Internally Balanced 24 tooth Reluctor wheel .857" Flange
    Connecting Rods: OE GM Forged Powder Metal 6.093" Stock Bolts
    Pistons: Hypereutectic Dish
    Piston Rings: Moly Rings
    Compression Ratio: 9.5:1 Compression
    Camshaft: Hydraulic Roller
    Camshaft Specifications: Custom Grind
    Camshaft Bearings: Installed & Clocked to OEM Position
    Cylinder Heads: OE Aluminum 61.15cc 1.89/1.55
    Freeze Plugs: Brass Installed & Sealed
    Rocker Arms: OE Powdered Metal 1.7 Ratio
    Oil Galley Plugs: Installed & Sealed


Recommended Accessories:

Oil: 5W30
Oil Filter: Wix or K&N Recommended Per Your Application
Fuel Delivery: OE EFI System With Tune
Intake Manifold: Stock EFI Manifold or Edelbrock Carb Conversion #2908
Fuel Injectors: Stock Inectors or Aftermarket For Optimal Performance
Spark Plugs: NGK #3186
Spark Plug Gap: .035"
Harmonic Balancer/Dampner: Stock Factory Balancer Internally Balanced
Flex Plate / Fly Wheel: Stock Internally Balanced
Tuning: Needs Tune/Preferably Chassis Dyno Tune
Timing: Set To Factory Speciffications Via PCM Module (Tune Required)
Water Pump; Per Your Application
Firing Order: 1 8 7 2 6 5 4 3
Exhaust: 1 5/8 Headers
Fuel Pump: Stock
Fuel: 91-93 Octane
Ignition: Stock or Aftermarket Coils
Automatic Transmission Stall Converter: Stock or 1800