Related Clues:

• Prefix with 'sphere'
• Fifty percent, up front?
• Hot rod engine, to car buffs
• Sphere header
• Sphere preceder
• ''Air'' starter
• Chrysler engine type
• Spherical beginning?
• It means "half"
• Chrysler V8 engine
• It means ''air''
• Starting half?
• Sphere intro
• Start for "sphere"
• Prefix before sphere