This internally balanced harmonic balancer is designed for big block Chevy crate engines that require a non-weighted balancer. Built to provide smooth, reliable operation, it helps control engine vibration while maintaining consistent performance for street-driven and performance builds. Featuring an 8-inch diameter and easy-to-read degree markings, it simplifies timing setup and tuning. Supplied with mounting hardware and intended for non-SFI applications, this balancer is a dependable, ready-to-install solution for internally balanced big block Chevy engines.