HP500 Replacement Engine 

New GM High Performance Marine Base Engines - HP500 Replacement Engine

• GM Standard Deck Mark VI 502 base engine 4.47 x 4.0
• 9 to 1 compression ratio
• GM forged crank, rods and pistons
• Crane hydraulic roller cam, springs, lifters, push rods, and rocker arms
• GM Heads Ported with 2.250 S/S Intake and Inconel Exhaust Valves
• 8 qt. oil pan
• Flywheel and dampner
• 500 HP @ 5200 RPM / 575 ft/lbs of torque @ 4800 RPM