If you're rebuilding a Vortec engine, these reconditioned connecting rods are exactly what you need. This set of 8 rods fits 1999-2014 Chevy Vortec engines including the 5.3L, 5.7L, 6.0L, and 6.2L Gen 4 models. They're specifically designed for engines with free floating pins - if your original rods have a bronze bushing in the pin end and a DOT marking on the beam, these are the right replacement. Each rod has been professionally reconditioned from original equipment parts, thoroughly cleaned and inspected, with both the small and big ends machined back to OE specifications. The center-to-center length is 6.098 inches with a rod bore of 2.2252 inches, and they carry the 3847 forging number. The rod bolts are replaced when necessary during the reconditioning process. These aren't cheap aftermarket parts - they're genuine OE rods that have been restored to like-new condition. Perfect for engine rebuilds where you want OEM quality without paying brand-new prices. They come ready to install and will provide reliable performance for your Vortec engine rebuild project.