A pre-process fractionation produces a feed product called E-corn, which is low in fat and contains heat-treated starch. E-corn replaced dry rolled corn at 0, 20, 40, or 60% (DM basis) in finishing diets containing either 30% wet distillers grains plus solubles (WDGS) or 30% wet corn gluten feed (WCGF). E-corn level x byproduct type interactions were not observed. Dry matter intake increased quadratically to E-corn inclusion level (P = 0.04), while F:G responded cubically with 20% and 60% E-corn inclusion having the lowest F:G (P = 0.02). However, when E-corn level increased from 0 to 60% of diet DM, linear decreases in marbling, fat depth, and calculated yield grade were observed (P < 0.01). Steers fed WDGS had lower DMI (P < 0.01) and F:G (P = 0.02) compared to steers fed WCGF. It appears that optimal inclusion of E-corn is 20% of diet DM.