Golf club heads and methods to manufacture golf club heads

A golf club head comprising:

• a body portion comprising a front portion, a rear portion, a toe portion, a heel portion, a bottom portion, an interior cavity, a top portion defining an opening that accesses the interior cavity;
• a vertical plane system characterizing the golf club head at an address position, the vertical plane system comprising a vertical plane bisecting the golf club head and intersecting a geometric center of a face portion in a front-to-rear direction;
• and
• a contoured crown portion attached to the top portion to close the opening in the top portion, the contoured crown portion comprising:
• an inner structural layer;
• an outer structural layer;
• a first integral rib disposed between the inner structural layer and the outer structural layer and on a first side of the vertical plane, the first integral rib extending rearward from a first integral rib starting location and terminating at a first integral rib ending location;
• a second integral rib disposed between the inner structural layer and the outer structural layer and on a second side of the vertical plane, the second integral rib extending rearward from a second integral rib starting location and terminating at a second integral rib ending location;
• and
• a raised central crown portion located between the first integral rib and the second integral rib,
• wherein the second integral rib ending location is forward of the first integral rib ending location in the front-to-rear direction, and
• wherein the raised central crown portion has an outer surface area that is greater than or equal to 40% of a total outer surface area of the contoured crown portion.

A golf club head comprising:

• a body portion comprising a front portion, a rear portion, a toe portion, a heel portion, a bottom portion, an interior cavity, and a top portion defining an opening that accesses the interior cavity;
• a vertical plane system characterizing the golf club head at an address position, the vertical plane system comprising a vertical plane bisecting the golf club head and intersecting a geometric center of a face portion in a front-to-rear direction;
• and
• a contoured crown portion attached to the top portion to close the opening in the top portion, the contoured crown portion comprising:
• an inner structural layer;
• an outer structural layer;
• and
• a first integral rib disposed between the inner structural layer and the outer structural layer and offset from the vertical plane, the first integral rib extending rearward from a first integral rib starting location and terminating at a first integral rib ending location in a direction that is non-parallel to the vertical plane.