Experience the pinnacle of connecting rod technology with our Pro Series rods, designed for ultimate performance.Superior Materials: These rods are available in two exceptional materials: forged 4340 or 300M vacuum degassed steel alloys, engineered for unparalleled performance and durability.NHRA Legal Certification: Certain SKUs within the Pro Series I-Beam range have earned "NHRA Legal" certification, ensuring compliance with NHRA legality standards for Stock and Super Stock racing categories.Versatile Weight Options: Our Pro Series I-Beam connecting rods offer multiple weights tailored to specific markets, including Tour Lites?, Lightweights, Standard Weights, and Heavy Weights, aligning perfectly with your engine's needs and performance objectives.