Supercharged 427CI 820HP Airboat Engine

Estimated Cost $34,995.00

Fully dressed 2650 Kong supercharged 427CI 820+HP with LSA  style crate engine.  We will custom paint the engine block, oil pan, timing cover, water pump, and valley pan to the color of your choice at no additional cost.  We also include the Wegner Performance alternator serpentine pulley system to make this a fully dressed drop-in ready unit.

  • 427CI 820HP Supercharged LS Airboat Performance Engine:
  • Fully Machined Dart SHP LS Next Iron Block
  • 4340 forged steel 4.00” stroke crankshaft (Eagle, or Scat)
  • H-Beam Rods 6.125”
  • Performance Forged Pistons (Mahle, Icon, DSS, or JE)
  • Complete Assembly Internally Balanced
  • Custom Ground Hydraulic Roller Camshaft (Comp Cams)
  • Hydraulic Roller lifters
  • Timing chain set
  • Melling Oil pump
  • LS3/L92 Rectangle Port Aluminum Performance Cylinder Heads
  • 2.165 Pro Series Intake Valves
  • 1.590 Pro Series Exhaust Valves
  • 1.295” Dual Performance Valve Springs
  • 7 Degree Valve Retainers And Locks
  • Roller Rocker Arms
  • Chrome Moly Pushrods
  • Main bolts (Dart/ARP)
  • Head studs (ARP/Dart)
  • Aluminum Timing And Rear Cover
  • Aluminum Valley Tray
  • Stroker Oil Pan
  • Aluminum Valve Covers W/-12AN Fittings
  • SFI Harmonic Balancer
  • Water Pump
  • 2650 Kong Supercharger
  • Black Anodized Supercharger Lid
  • DBW Throttle body
  • Oil And Filter
  • LS3 STyle Coil Packs
  • Calibrated ECU (Holley Terminator X Max)
  • Main ECM Engine Wiring Harness
  • Coil Pack Harness
  • Fuel Injector Harness
  • 8MM Plug Wires
  • Wide Ban O2 Sensor
  • Intake Air Temperature Sensor
  • Crankshaft Position Sensor
  • Camshaft Position Sensor
  • Engine Coolant Temperature Sensor
  • Manifold Air Pressure Sensor
  • Spark plugs
  • Fuel Injectors
  • Engine will be dyno tested with a starting tune – EFI system has self-tune capabilities
  • No warranty!
  • Additional Items:
  • Concept One/ Or Wegner Performance Pulley Kit:
  • Supercharger Kit
  • Black anodized finish pulleys and brackets
  • 165 Amp black alternator
  • Belt and hardware
  • K&N Universal Performance Air Filter
  • Front Y-Block With Fuel Hose
  • Universal Bypass Regulator
  • Rear Fuel Hose
  • Fuel Pressure Gauge
  • Starter With Bolts

All of the Proformance Unlimited turn-key LS engine packages will include an engine harness and an ECM to allow for full engine control and the best driving characteristics possible. Most other suppliers of turn-key engine packages will use out-of-date MEFI ECM’s and harnesses that do NOT allow the engine to make fueling or timing changes when running, nor will they allow for any needed changes with varying altitude. All of our turn-key engine packages will allow your engine to run and function exactly like a new car straight off of the production line! This will not only help the power output, but it will also help to maximize the fuel mileage! If you choose the Fitech ultimate efi w/trans control this will allow for full control of a GM’s 4-speed overdrive 4L60E, 4L65E, 4L70E, and 4L80E electronically-controlled transmission. The competition’s MEFI ECM and harness does not have this capability.

All of our turn-key engine packages will come standard with the GM Performance aluminum valve covers with a coil pack relocation kit and GM Hot Rod Oil Pan Kit. However, we do offer upgrades for all of these items, which are listed above in the drop-down menus. Let us know if you are looking for an item that is not listed, and we will be glad to provide you with a price! The aluminum coil pack relocation kit allows you to hide the ignition coil packs anywhere you would like under the hood, which provides you with a clean and uncluttered engine bay.

All Proformance Unlimited turn-key engine packages will come standard with a one-year, unlimited-mile warranty as standard! This will require all tuning to be performed by us. We stand behind our work, and when you purchase a Proformance Unlimited engine you are not only buying the parts but also the knowledge, experience, and know-how! We know what works and what is required to complete the installation! what is an Air Boat Engine?