K1 Technologies Chevy Crankshafts

  • Manufactured from forged or billet premium 4340 steel
  • Engineered specifically for high-stress racing applications
  • Nitrided for improved strength and bearing life

  • Large fillet radii for improved strength
  • Straight hole oiling system for improved lubrication
  • Size tolerances held to +/-.0001".

CHEVY SMALL BLOCK - 350 MAINS

Part Number Former P/N Description Stroke Main Journal
Diameter
Rod Pin
Diameter
Minimum
Rod Length
Flange Bob Weight
(Grams)
Weight
(Lbs)
Footnote
012DAD348 350-3480BB6F-57 Chevy 350 Forged Crankshaft 3.480 2.450 2.100 5.700" 6 Bolt Chevy 1900 53
012DAD375 350-3750BB6F-57 Chevy 350 Forged Crankshaft 3.750 2.450 2.100 5.700" 6 Bolt Chevy 1900 55
012DAD400 350-4000BB6F-60 Chevy 350 Forged Crankshaft 4.000 2.450 2.100 6.000" 6 Bolt Chevy 1900 57

CHEVY LS SERIES CRANKSHAFTS

Part Number Former P/N Description Stroke Main Journal
Diameter
Rod Pin
Diameter
Minimum
Rod Length
Flange Bob Weight
(Grams)
Weight
(Lbs)
Footnote
012FAE362 346-3622RB6F Chevy LS Forged Crankshaft. 3.622 2.650 2.100 6.098" 1775 51
012FAE36224 346-3622RB6F-24 Chevy LS Forged Crankshaft. 24 Tooth Reluctor. 3.622 2.650 2.100 6.098" 1775 52
012FAE36258 346-3622RB6F-58 Chevy LS Forged Crankshaft. 58 Tooth Reluctor. 3.622 2.650 2.100 6.098" 1775 52
012FAE390 346-3900RB6F Chevy LS Forged Crankshaft. 3.900 2.650 2.100 6.098" 1800 52
012FAE39024 346-3900RB6F-24 Chevy LS Forged Crankshaft. 24 Tooth Reluctor. 3.900 2.650 2.100 6.098" 1800 53
012FAE39058 346-3900RB6F-58 Chevy LS Forged Crankshaft. 58 Tooth Reluctor. 3.900 2.650 2.100 6.098" 1800 53
012FAE400 346-4000RB6F Chevy LS Forged Crankshaft. 4.000 2.650 2.100 6.098" 1800 52
012FAE400-24 346-4000RB6F-24 Chevy LS Forged Crankshaft. 24 Tooth Reluctor. 4.000 2.650 2.100 6.098" 1800 53
012FAE400-58 346-4000RB6F-58 Chevy LS Forged Crankshaft. 58 Tooth Reluctor. 4.000 2.650 2.100 6.098" 1800 53
012FAE410 346-4100RB6F Chevy LS Forged Crankshaft. 4.100 2.650 2.100 6.098" 1875 53
012FAE410-24 346-4100RB6F-24 Chevy LS Forged Crankshaft. 24 Tooth Reluctor. 4.100 2.650 2.100 6.098" 1875 54
012FAE410-58 346-4100RB6F-58 Chevy LS Forged Crankshaft. 58 Tooth Reluctor. 4.100 2.650 2.100 6.098" 1875 54
012FAE413 346-4125RB6F Chevy LS Forged Crankshaft. 4.125 2.650 2.100 6.098" 1875 53
012FAE413-24 346-4125RB6F-24 Chevy LS Forged Crankshaft. 24 Tooth Reluctor. 4.125 2.650 2.100 6.098" 1875 54
012FAE413-58 346-4125RB6F-58 Chevy LS Forged Crankshaft. 58 Tooth Reluctor. 4.125 2.650 2.100 6.098" 1875 54
012FAE425 346-4250RB6F Chevy LS Forged Crankshaft. 4.250 2.650 2.100 6.098" 1875 53
012FAE425-24 346-4250RB6F-24 Chevy LS Forged Crankshaft. 24 Tooth Reluctor. 4.250 2.650 2.100 6.098" 1875 54
012FAE425-58 346-4250RB6F-58 Chevy LS Forged Crankshaft. 58 Tooth Reluctor. 4.250 2.650 2.100 6.098" 6 Bolt 1875 54

CHEVY BIG BLOCK

Part Number Former P/N Description Stroke Main Journal
Diameter
Rod Pin
Diameter
Minimum
Rod Length
Flange Bob Weight
(Grams)
Weight
(Lbs)
Footnote
012GAG425 4544250DC6F6385 Chevy BB Forged Crankshaft 4.250 2.750 2.200 6.385" 6 Bolt 2150 81
012GAG438 4544375DC8F6385 Chevy BB Forged Crankshaft 4.375 2.750 2.200 6.385" 2150 82
012GAG450 454-4500DC8F Chevy BB Forged Crankshaft 4.500 2.750 2.200 6.385" 6 Bolt 2150 82