416CI/550HP LS3

416CI / 550HP GTO/MAS LS3 Small Block

New to the GTOPerformance Airboats lineup, LS Family of Engines. We start with a new LS3 GM Block with a 4.00″ bore, forged internal rotating assembly, 10.1:1 compression ratio, and aggressive hydraulic roller cam. The engine’s top half includes a pair of CNC ported LS6 heads, the intake is a matching high-flow Victor Jr. aluminum piece. With 560 ft/lbs torque and a conservative 550 HP rating, this is one of the best engine choices for an excellent performing ride boat.


  •     New GM 6.2 Aluminum Block
  •     Eagle 4.00 Stroke Crank
  •     Eagle H-Beam Rods 6.125
  •     DSS or Mahle Forged Pistons
  •     Clevite H Bearings
  •     Custom Comp Roller Cam  .621/.624 Lift
  •     CNC Ported LS6 Heads  2.02, 1.6 Valves
  •     Edelbrock Victor Jr Intake
  •     Quick Fuel Q-850 Carb
  •     MSD Programmable Ignition Box
  •     L92 Truck Coils
  •     Custom 10qt Oil Pan with Windage Tray
  •     ARP Head Bolts
  •     GM Performance Rockers
  •     1 Wire Alternator Kit
  •     Water Pump & Serpentine Belt
  •     Blue Printed & Dyno Tuned

Also available with Electronic Fuel Injection.  Equipped with GM LS6 intake, LS Coil Packs, Stand alone computer and fuel system.

Price:  $CALL

All engines are computer balanced, blue printed and dynoed before shipping.  Engines also come with build documentation and a 2 year unlimited hour warranty.