Models View all Aircraft Cub Style Boxer Engine STEP File 17 86 3 Aircraft Boxer Engine outside half STEP File 6 50 0 Aircraft Boxer Engine Cylinder (Cub Style) STEP File 3 50 0 Wright R-790 Whirlwind J5 STEP File 17 75 4 Wright R-790 Whirlwind 10 36 2 Generic Cowlings- F360 and STLs 5 22 0