18-Spline for 426, 440 Mopar. Spline Count:18 Spline. 1-3/16″ x 18 Spline Input Shaft. Engine:426 HEMI, 440 RB. Length:4.500 in. We do our best to display images of the actual product being sold. Occasionally, we use a universal image because the manufacturer has not supplied us with a photo.