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  DOMINATOR Engine Kit - Ford 331 Reverse Dome -20.1cc
Ford 331 Reverse Dome -20.1cc Dominator Engine Kit

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The Dominator series of Engine Kits feature all the components necessary for all out competition. Dominators include internally balanced forged specialty crankshafts (where applicable), 4340 forged competition connecting rods, and Probe forged pistons. Components are selected specifically for each intended application.

Dominator Kits Include:

  • Probe SRS Forged Pistons
  • Forged 4340 Crankshaft (Typically Internal)
  • Probe Forged 4340 Lightweight or Ultralight I-Beam Rods
  • Perfect Circle or Total Seal File-fit Rings
  • Clevite H-Bearings 
  • Tool Steel Wrist Pins

Item# Item Name Racer Price Qty Add
11938-030-DM-F331 DOMINATOR Engine Kit - Ford 331 Reverse Dome -20.1cc (+.030")
11938-040-DM-F331 DOMINATOR Engine Kit - Ford 331 Reverse Dome -20.1cc (+.040")
11938-STD-DM-F331 DOMINATOR Engine Kit - Ford 331 Reverse Dome -20.1cc (STD)
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Technical Specs:
Item Code11938-DM-F331
Vendor NameProbe Industries
Product TypeEngine Kit
Product ModelDominator
Engine Displacement (
Engine FamilyFORD-LINCOLN-MERCURY - Small Block 302 Based V8
Piston ManufacturerProbe Industries
Piston Part Number11938
Piston Material2618-t61 Forged Aluminum
Piston Top TypeReverse Dome
Piston Head Volume (CC)-20.1cc
Piston Base Bore (in)4.000
Piston Compression Height (in)1.175
Ring TypeMoly-File Fit
Crankshaft VendorProbe Industries
Crankshaft Part Number14906
Crankshaft Material4340 Forged Steel
Crankshaft Stroke (in)3.250
Crankshaft Main Journal Size (in)2.248
Crankshaft Rod Journal Size (in)2.123
Connecting Rod VendorProbe Industries
Connecting Rod Part Number10066
Connecting Rod Material4340 Forged Steel
Connecting Rod Length (in)5.400
Connecting Rod TypeLightweight I-Beam

Compression Ratio:
Part NumberCylinder Head Volume

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Engine Kits > Ford - 302 Small Block V8 > 331 cubic inches > Reverse Dome
Make > Ford