Related Clues:

• It means half
• Fifty percent, up front?
• Hot rod engine, to car buffs
• Sphere header
• Chrysler engine type
• It means "half"
• Starting half?
• Start for "sphere"
• Prefix before sphere
• Half up front?
• Prefix for 'half'
• Spherical start
• Half: Pref
• Spheric opener?
• ___ engine