*Shown With Optional Upgrades

Fuel Injected LS 441CI Airboat Engine 720HP

$15,495.00

Pay a 50% deposit per item

Chevy LS Based 441CI stroker with 720HP and 650TQ performance aluminum head engine combination was designed for maximum performance on pump gas. Typical power range is 720HP @ 6200 rpm and 650TQ @ 5100 rpm. All engines can be custom painted to match your airboat at your request.

  • Fully Machined Aluminum LS Block
  • Eagle 4340 steel 4.125” stroker crankshaft
  • Eagle I-Beam Rods 6.125”
  • 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
  • Rocker Arms With Upgraded Full Trunnion
  • Manley Chrome Moly Pushrods
  • Main bolts
  • ARP Head bolts
  • Aluminum Timing And Rear Cover
  • Aluminum Valley Tray
  • 7 Quart Oil Pan
  • Holley Aluminum Valve Covers
  • F-body style Balancer
  • Water Pump
  • 102mm Cable Driven Throttle Body
  • Oil And Filter
  • Spark Plugs
  • Electronics/Wiring Harnesses:
  • Coil pack bracket
  • MSD Coil Packs
  • Calibrated ECM
  • 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
  • Engine Knock Sensor
  • Manifold Air Pressure Sensor
  • Fuel Injectors
  • Engine will be Dyno tested and tuned for optimum performance
  • 1 Year 200 hour marine/airboat warranty

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.

Contact:

733 North Drive
Suite B
Melbourne, FL 32934
PH: 800-267-3940
Info@proformanceunlimited.com

Shop Hours:

Mon–Thur 8am – 5pm EST
Friday 8am – 4pm EST
Walk-in’s welcome please call for appointment

PROFORMANCE UNLIMITED INC. RESERVES THE RIGHT TO MAKE CHANGES IN DESIGN OR TO MAKE ADDITIONS TO OR IMPROVEMENTS UPON ANY OF ITS PRODUCTS AT ANY TIME WITHOUT INCURRING ANY OBLIGATION WHATSOEVER TO INSTALL THE SAME OR IMPROVEMENT UPON PRODUCTS PREVIOUSLY MANUFACTURED. OCCASIONALLY DEPENDING ON AVAILABILITY, PARTS MAY BE SUBSTITUTED THAT WILL NOT EFFECT PRICE, PERFORMANCE, APPEARANCE OR QUALITY OF THE PRODUCT.
*Engine shown with optional upgrades