*Shown With Optional Upgrades

LS 430CI Airboat Engine 650HP

Estimated Cost $18,495.00

Fuel Injected LS 430CI Airboat Engine 650HP

Chevy LS Based 430CI with 650HP performance aluminum head engine combination was designed for maximum performance on pump gas. Typical power range is 650HP @ 5800 rpm. All engines can be custom painted to match your airboat at your request.


  • Fully Machined LS Aluminum Block 
  • Forged Steel 4.125” stroker crankshaft (Eagle, Scat, or LPC)
  • Forged Connecting Rods 6.125” (Eagle, Scat, or LPC)
  • Performance Forged Pistons (Mahle, Icon, DSS, or JE)
  • Complete Assembly Internally Balanced
  • Comp Cams Custom Ground Hydraulic Roller Camshaft
  • 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
  • Performance Rocker Arms 
  • Chrome Moly Pushrods
  • Main bolts
  • ARP Head bolts
  • Aluminum Timing And Rear Cover
  • Aluminum Valley Tray
  • Stroker Oil Pan
  • Aluminum Valve Covers W/-12AN Fittings
  • Harmonic Balancer
  • Water Pump
  • Fabricated Aluminum Intake Manifold
  • Cable Driven Throttle Body (102mm)
  • Oil And Filter
  • LS3 Style Coil Packs
  • Calibrated ECU (Holley Terminator X)
  • 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 and tuned for optimum performance
  • 1 Year 200 hour marine/airboat warranty


  • Additional Items:
  • Water Pump Pulley
  • Alternator Pulley
  • Alternator Bracket
  • 140 Amp One Wire Alternator
  • A Serpentine Belt To Match Application
  • K&N Universal Performance Air Filter
  • Front Y-Block With Fuel Hose
  • Universal Bypass Regulator
  • Rear Fuel Hose 
  • Fuel Pressure Gauge
  • Starter With Bolts

Which Style Engine Should I Use? An Aircraft Engine Or An Automotive Style Engine?

While Aircraft engines produce a Lot of low RPM torque they are very expensive to buy and maintain. An automotive engine when designed correctly can achieve the same torque and horsepower at a much more reasonable cost. Maintenance parts can be purchased at most automotive supply stores and the cost is considerably cheaper.

We have developed several extremely durable engine combinations that will Mmeet almost everyones needs. These engine combinations feature forged pistons, roller camshafts, specialty valve train components, additional oil capacity, Etc. That have been tested time and time again to ensure there durability will stand up to the job. Most airboat engine manufactures are still using old technology that just simply won’t last very long to keep cost down, When in the long run will cost you more money. The engine packages that are listed come standard with fuel injection. With todays fuel containing so many additives and ethanol, carburetors just don’t last very long. For those of you that think fuel injection is not right for your application, We can downgrade the engine package to come with a carburetor.

Proformance Unlimited airboat engines are currently used by law enforcement, airboat charter services, and even saw service in specialty categories like the winter olympics.