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MTM117-123 - Mast Motorsports L99 416 SS Black Label Turnkey Crate Engine (605HP), NO ECM or Harness

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

Availability: Item has been discontinued and is no longer available
Shipping: FREE 48 State Shipping


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
  • 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



    • 117-123
    • 117-123
    • Mast Motorsports
    • Item has been discontinued and is no longer available
    • New


    Shipping Information

    • Item Requires Shipping
    • 500.0 lbs.
    • FREE 48 State Shipping

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