Replacement Rod Bolts 7/16 ARP200 1.600 UHL

The MANLEY Replacement Rod Bolts 7/16 ARP2000 1.600 UHL (MAN42249-4) is a high-strength fastener set engineered for precision engine builds where connecting rod integrity directly impacts reliability and longevity. These 7/16-inch bolts feature a 12-point head design and 1.6-inch length, manufactured from chromoly steel and processed to ARP2000 specification—a material standard known for superior tensile strength and fatigue resistance in high-revving and high-compression applications.

Each set includes four bolts with chromoly construction and a natural (uncoated) finish. ARP2000 fasteners deliver approximately 200,000 PSI tensile strength, providing the clamping force necessary to maintain rod-to-crankshaft concentricity under sustained load and vibration. The 12-point head geometry distributes load more evenly than 6-point alternatives and reduces fastener stress concentration. The 1.600-inch underhammer-length specification ensures proper seating in connecting rod bores without interference, critical for engines with tight tolerances or modified rod geometry.

These bolts suit engine builders, performance machine shops, and enthusiasts performing connecting rod replacement, upgrade, or repair on engines requiring ARP2000-grade fasteners. Common applications include street performance builds, off-road power units, and any engine where factory rod fasteners are being upgraded for increased reliability margin. Proper torque specification and stretch-bolt procedure are essential during installation; consult engine-specific assembly documentation and use calibrated tooling to achieve correct preload.

Replacement rod bolt kits from quality manufacturers like MANLEY are industry-standard components in engine rebuilding. When original fasteners are removed, damaged, or upgraded, matched replacement sets ensure consistent preload and eliminate the risk of mixing materials or strength grades—a critical detail for engine durability.