The following is a list of the core items you will need to turn in as core parts for the SPA Engine in a Box program.  We also offer a core fee if you choose to not provide these core items.  

The mailing address for all parts is:

Sport Performance Aviation LLC

1528 Virgils Way


Green Cove Springs, FL 32043

Please put your name, clearly, on the shipping container and inside.

Please note - the cores will need to follow the guidelines in William Wynne's Conversion Manual from

  • Case
  • Crankshaft with rear gears (eccentric, spacer, bronze gear and oil slinger)
  • Camshaft
  • connecting rods
  • harmonic balancer
  • Rear accessory housing
  • Cylinder heads
  • Guide plates
  • Cylinders
  • rocker arms
  • rocker studs
  • push rods
  • push rod tubes
  • valve covers and hold down clamps
  • oil pickup
  • distributor
  • baffles - side and rear and wire clamps
  • oil filler neck
  • case bolts and nuts
  • Distributor clamp