This Eagle balanced rotating assembly is specified for Chevy 409 applications and lists core internal dimensions for builders. It pairs a 4.000-inch crank with 6.135-inch I‑beam rods and 4.372-inch pistons with a .365-inch dome, sold as a matched, balanced assembly. The specification-focused description helps engine builders verify component sizing and clearances during short‑block assembly or rebuilds.

Eagle Chevy 409 4.000in Crank 6.135in I-Beam Rods .365in Dome 4.372in Pistons Balanced Assembly