Eagle 434640006100; Forged 4 in. Stroke, 6.125 in. Rod, 24t for Chevy LS Stroker. Engine:LS Stroker. Material:Forged 4340 Steel. Stroke:4.000 in. Eagle forged 4340 steel Cranks feature a non-twist forging. 125" fillet radiuses for superior strength so chamfered / narrowed bearings required, nitrided surface and micropolished.