Front View Looking Straight Down The Frame Rail. The Axis Of The Upper Arm Is At About A 15 Degree Angle From The Centerline, And Tilted Back A Few Degrees. Photos, Front View Looking Straight Down The Frame Rail. The Axis Of The Upper Arm Is At About A 15 Degree Angle From The Centerline, And Tilted Back A Few Degrees. Pictures, Front View Looking Straight Down The Frame Rail. The Axis Of The Upper Arm Is At About A 15 Degree Angle From The Centerline, And Tilted Back A Few Degrees. Images