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MTM111-123 - Mast Motorsports Turn-Key Black Label L99 SS 416 Crate Engine - 620 HP With VVT Camshaft, With M-120 ECM and Harness

This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.

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Availability: Item has been discontinued and is no longer available
Shipping: FREE 48 State Truck Freight Shipping (International shipping will require freight quote)


Type:L99 6.8L
Displacement:416 Cubic Inches
Compression Ratio:11.2:1
Bore x Stroke:4.070 x 4.000
Rev Limit:7000 RPM
Crank:Callies Forged
Rods:Callies H-Beam
Pistons:Mahle Motorsports
Cam:Mast Custom VVT Core Cam
Heads:Mast Black Label LS3 Heads
Intake:LS3 Car Intake
Valve Springs:Mast Beehive

Complete engine specs

  • LS3 Aluminum Block
  • Plateau Honed to 4.070”
  • True Surfaced Deck
  • Engine Block Debured
  • Blueprinted Shortblock
  • GM Car Harmonic Damper
  • ACL Rod and Crank Bearings
  • Callies 4.000 Stroked Crankshaft
  • Callies H-Beam Connecting Rods
  • Mast/Mahle Motorsports Pistons
  • Mast Black Label LS3 11 Degree Heads
  • ARP Head Bolts
  • ARP Main Studs
  • Cometic Head gaskets
  • GM VVT Phaser with Restrictor
  • Mast VVT Custom Hydraulic Roller Cam
  • LS3 Hydraulic Roller Lifters
  • Mast Black Label Pushrods
  • Mast Beehive Valve Springs
  • M-120 Calibrated ECM
  • M-120 Main Wiring Harness
  • MAP/IAT Harness
  • Dual Bosch EGO Sensor
  • LS3 IAFM
  • GM 90mm DBW Throttle Body
  • Bosch Dead Headed Fuel Rail
  • Bosch LS3 Fuel Injectors
  • Mast 8 Layer Air Filter with IAT Bung
  • Intake Air Temperature Sensor
  • Crankshaft Position Sensor
  • Camshaft Position Sensor
  • Oil Pressure Sensor
  • Oil Temperature Sensor
  • Engine Coolant Temperature
  • Engine Knock Sensors
  • Manifold Air Pressure Sensor
  • Ignition Coils
  • Spark Plugs
  • Mast Plug Wires
  • GM Foot Pedal
  • GM Starter
  • GM Oil Filter
  • Engine Break in Oil Additive
  • Your choice of F-Body, Y-Body, or Truck Water Pump, Balancer, and Oil Pan

    Runs on Premium 91-93 Octane
  • Application List



    • 111-123
    • 111-123
    • Mast Motorsports
    • Item has been discontinued and is no longer available
    • New


    Shipping Information

    • Item Requires Shipping
    • 500.0 lbs.
    • Free Shipping!
    • FREE 48 State Truck Freight Shipping (International shipping will require freight quote)

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