Eagle "ESP" Forged 4340 Steel Crankshaft - SB Chevy 350, 2 Piece Rear Seal - 3.480" Stroke, 5.700" Rod Length, 2.100" Rod Journal FR Underwear Bra AFR's spread port head has

AFR's spread port head has all the benefits and features of AFR's standard head

3-1/4 in ID

2004 Ford F-150 Heritage

Sizes: XXS – XXL

Eagle "ESP" Forged 4340 Steel Crankshaft - SB Chevy 350, 2 Piece Rear Seal - 3.480" Stroke, 5.700" Rod Length, 2.100" Rod Journal FR Underwear Bra AFR's spread port head hasEagle forged 4340 steel cranks feature a non twist forging, . 125" fillet radiuses for superior strength so chamfered narrowed bearings required, nitrided surface, &amp micropolished to &lt 2 ra. Intended for the most demanding applicationForged AISI ASME certified 4340 steel with multi stage heat treatment for superior strength Service: Eagle connecting rods and cranks are designed and manufactured to our specifications. Some simply purchase generic