Wiseco LS6125-927BLL19S BoostLine 6.125" Single Connecting Rod for GM LS/Gen V LT

The Wiseco BoostLine LS6125-927BLL19S is a single, bushed connecting rod engineered for high-horsepower forced induction and nitrous applications. Sold individually, this rod is the same unit found in the full LS6125-927BLL19 kit, making it ideal for replacement or custom odd-count builds.

At the heart of the BoostLine design is a patented 3-pocket beam geometry forged from premium 4340 steel — combining the low mass of an H-beam with the superior bending resistance of an I-beam. The result is 60% more bending strength over conventional H-beam rods, with a horsepower rating up to 2,000 hp in 8-cylinder applications.

Key Specifications:

• Rod Length (center-to-center): 6.125 inches
• Wrist Pin Bore Diameter: 0.927 inches (bushed small end)
• Big End Journal Diameter: 2.100 inches
• Big End Bore Diameter: 2.225 inches
• Big End Width: 0.940 inches
• Pin End Width: 1.010 inches
• Rod Weight: approximately 692 grams
• Rod Bolt: 7/16" ARP 2000 cap screws (220,000 psi rating)
• Beam Style: Patented 3-pocket (hybrid H/I-beam)
• Material: Forged 4340 steel, heat-treated and shot-peened
• Sold: Individually (single rod)

Key Features:

• High-quality Ampco bushing material in small end for superior wrist pin support
• Pin clearance of 0.0009"–0.0011" for precise, builder-customizable wrist pin fitment
• Each rod individually inspected on aerospace-grade CMM (Coordinate Measuring Machine) equipment
• Includes individual inspection report from Wiseco's quality team detailing critical dimensions to 0.0001"
• Designed, finish-machined, and inspected in the USA (Mentor, Ohio)
• Vacuum-wrapped in plastic for corrosion protection; foam-separated for shipping safety
• Compatible with optional ARP 625+ upgrade bolts (260,000–280,000 psi)

The BoostLine rod's unique 3-pocket design was engineered from scratch to handle the extreme tension, compression, and bending loads generated by turbocharged, supercharged, and large-shot nitrous builds. Whether replacing a single rod in an existing set or sourcing a matched replacement, the LS6125-927BLL19S delivers race-proven reliability and precision in a single-piece package.