Precision-forged ISF3.8 engine connecting rod crafted from high-strength alloy steel for extreme durability. CNC-machined to exact OEM specifications (5263945) with micro-polished bearing surfaces for reduced friction. Ideal for Cummins ISF3.8L diesel engine rebuilds, heavy-duty truck maintenance, and industrial equipment repairs. Features fracture-split design for perfect cap alignment and balanced weight distribution. Direct replacement part with 100% compatibility guarantee. Sold exclusively at wholesale pricing for bulk purchasers.