Eagle Pontiac 400 Forged Steel Crankshaft, 4.2500in Stroke (eag440042506700)
Eagle forged 4340 steel cranks feature a non-twist forging, .125" fillet radiuses for superior strength so chamfered / narrowed bearings required, nitrided surface, & micropolished to < 2 ra. Intended for the most demanding applications.
Crankshaft must be balanced to match your specific rods and pistons.
Highlights:
material: forged 4340 steel
intended balance: internal
target bobweight: 2280g
stroke: 4.250"
rod journal: 2.2"
rod journal width: 2.000"
main journals: 3.000"
minimum rod length: 6.700"
typical weight: 72 lbs.
rear seal diameter: call
snout diameter: 1.373"
flywheel bolts: 6
pilot bore diameter: 1.383"
flywheel register diameter: 2.75"