Sonny's 820 cu. in. Hemispherical Headed EFI Marine Engine

This 820 cu. in. beauty is great for weekend boating!!
(Pictures may show optional equipment. Click to enlarge.)


Sonny's now offers for 2020,  a 5.3 Bore Space Hemispherical Headed EFI Marine Engine. 5.045 Bore X 5.125 Stroke,  The 820 Cu. In. Engine makes over 1450 HP Naturally Aspirated, and over 1180 ft. lbs torque @ 5900 RPM. Works great for poker runs, recreational boating.( Check out the water flow on the block pictured above!!) Naturally Aspirated, No Power Adders ! 114,600.00

** Sonny's also offers a 2020  stage II Version which uses a billet intake manifold, front mounted throttle bodies, Billet oil pan with 5 stage billet oil pump, makes 1650 HP on 110 octane racing fuel, and over 1250 ft. lbs torque @5800 RPM Naturally Aspirated!! No Power Adders!  Only  $ 3,300.00 additional over standard 820 engine   

Complete and Dyno Tested
Price: $114,600.00
✷ Call 434-239-1009 or Contact Us


  • Sonny's in-house fully CNC ported "Next Generation" Hemispherical cylinder heads
  • SAR special Billet aluminum 5.300 B.S. water block with 2.000" raised cam
  • Bryant billet crankshaft
  • Carrillo Steel Billet rods
  • BME Endurance pistons
  • Isky/ Sonny's 1.062 EZ MAX keyed lifters
  • 1.031 tool steel taper-wall pins
  • Total Seal rings
  • Manley valves & PSI springs
  • SAR shaft mounted rocker system with needle bearing roller tips
  • Jesel belt drive
  • Moroso 5-stage dry sump oiling
  • ATI balancer
  • MSD cranktrigger
  • SAR sheetmetal 2x4 intake w/linkage
  • Sonny's/ Accufab 2x4 2.750 Throttle Bodies
  • . Sonny's/Big Stuff EFI with 8 injectors and run map
  • Sonny's Billet valve covers
  • hi-flow mechanical water pump
  • MSD Pro Series starter
  • Fuel lines with EFI regulator
  • . 12 or 16 volt alternator
  • . Complete and Dyno Tested
  • ** Also Available In Kit Form, call for details and pricing
For questions or additional information, call 434-239-1009 or Contact Us