ATK High Performance GM 383 Stage 1 Marine Long Block Crate Engines HP90

Replace the tired small block in your boat with ATK High Performance GM 383 Stage 1 marine long block crate engines. They are built from the ground up with off-shore performance in mind. These hand-built and balanced engines utilize Vortec power and stroker torque to produce an awesome 345 hp and 445 ft.-lbs. of twist that will get you moving on the open water. Each engine features brass freeze plugs and corrosion-resistant marine gaskets to keep the engines healthy and reliable.

ATK GM 383 Stage 1 Marine long block crate engines include:

* Handpicked, remanufactured blocks
* Dart Iron Vortec cylinder heads
* Nodular steel crankshaft and 4340 I-beam connecting rods
* Hypereutectic pistons
* Hydraulic roller camshaft
* Valve covers
* Timing cover and timing set
* Oil pan, pump, and pickup tube