The WaterThunder Performance Electronic Fuel injection 440 Cubic Inch LS stroker motor has both incredible throttle response and bottom end torque with great fuel economy. Our EFI motors come complete ready to run except for the air cleaner. We do have a filter package that works for many boats. Nothing in this package is used, all components are new!

All of our 440 Cubic Inch all aluminum stroker engines come with:

• New custom machined LS7 aluminum block
• New 4340 EAGLE forged crankshaft 4.125 stroke
• ACL or Clevite race bearings
• ARP pro main studs
• New Eagle 4340 3D H beam rods with ARP rod bolts
• ARP 12 point rod bolts
• New Aries or CP forged pistons with file fit rings
• Total Seal file fit rings
• New L92 heads with stage 1 porting
• Titanium retainers, 4340 valve locks and gas nitrated micro-polished double valve springs with Vinton seals
• G.M. roller rockers
• New ARP pro main and head studs
• A custom picked cam to match the application
• New Cloyes Hex Adjust timing chain
• CNC ported and Teflon coated oil pump
• High pressure fuel pump
• Fuel pressure regulator
• Fuel injectors and fuel rail with to match the package
• G.M. low profile plastic intake
• FAST 92mm billet throttle body
• Fully programmable ECU with many extra features
• G.M. truck coil packs
• Custom WaterThunder Performance sheet metal coil covers, powder coated in color of your choice
• Wix 51522 oil filter
• ACDelco Iridium spark plugs
• Filled with Valvoline 10W-40 motor oil
• G.M. water pump modified for easy cooling system filling and burping
• 160 degree thermostat and housing
• Bubble tube and two blocks
• 2 Crankcase breathers
• Block mounted 115 amp self exciting one wire alternator
• Auto tensioner, idler pulley, bracket, and serpentine belt
• H.D. flywheel with matching bolt pattern for your reduction unit
• Upgraded Nippondenso style motor with 4.4 to 1 gear reduction starter
• Custom Innovative Accessories stainless long tube headers with 3/8" laser cut flanges specifically developed for our motors
• Multi-layer aluminum Percy's header gaskets with bolts and lock washers
• Upgraded color matching (if available) Taylor 409 10.5 mm plug wires

All of our 440 Cubic Inch strokers get the following labor performed:

• Valve seat pressures set
• Block and plug power on demand lifter bleed off holes
• Camshaft installed and degreed (phased) to appropriate centerline
• Oil pump blueprinted and all passages in pan and oil pump ported to improve flow
• Set oil pump pressure bypass control according to oil used
• Engines are filled with oil and test run, inspected for oil leaks and leak down tested after break in
• Break-in Oil filter is removed and inspected and a new filter installed
• All engines must meet our requirements for idle oil pressure, max oil pressure and leak down percentage, along with exhaust gas temperatures
• We have a quality assurance guide line sheet that all engines must meet 100% before delivery

When you buy our complete packages. You only need to bolt on a gearbox and prop. Bolt on your motor mounts. Mount and wire the engine. Plum the fuel lines from your lift pump to the high pressure pump we provide. Then from there to the fuel rail of the motor. Run cooling lines to your radiator and burp tank. Fill it with a 50/50 mix of Dex-cool and water. Hook up guages and intall an intake large enough for the motor. We provide everything else. We will also bolt up your gearbox for free if you bring or ship it to us.

We also have intake kit for sale that fits on some boats and has a filter large enough K&N filter for the motor. Just ask about it when you call.

This package is: $23,999*

* All parts and prices are subject to change without notice.