Carrillo Nissan/Infiniti QR25 Pro-H 3/8 WMC Bolt Connecting Rods

Carrillo is well-known for making strong internal engine components for demanding applications. These Pro-H connecting rods are a prime example, specifically designed for the Nissan/Infiniti QR25 engine found in vehicles like your 2002-2013 Altima. If you're building a performance QR25 engine, these rods are a critical piece for handling increased power and stress.

These rods feature Carrillo's Pro-H beam design, which offers a good balance of strength and weight. They are forged from high-strength steel and come equipped with 3/8 inch WMC (Wichita Machine Company) bolts, which are a popular choice for their reliability in high-stress environments. The WMC bolts are known for their consistent clamping force and durability under repeated cycles of high load. This setup ensures that your connecting rods can withstand the rigors of a performance engine build, helping to prevent failures that can occur with stock components when pushed beyond their limits.

When you're rebuilding the bottom end of a QR25 engine for performance, using well-built connecting rods like these Carrillos is essential. They are designed to be a direct replacement for the factory rods, simplifying installation for your mechanic. Make sure to follow the manufacturer's recommended torque specifications and assembly procedures when installing these rods to ensure optimal performance and longevity.