Challenger Shaker hood question

[Hemi T/A]

Ive seen a few Shaker hoods that have a center rib in front of the opening , this rib follows along toward the front and stops where it widens for a Pentastar to be mounted on it , Ive seen another ( in pictures ) that doesnt have this center rib and is flat with no Pentastar . Is this a model year change ? or possibly a stock flat hood that was made into a shaker .

 

[MoparCarGuy]

Challenger Shaker hoods came in three different versions.
1st Version: Without crumple zone creases, with center rib, and with Fratzog emblem centered at front of rib.
2nd Version: With crumple zone creases, with center rib, and with Fratzog emblem centered at front of rib.
3rd Version: With crumple zone creases, with center rib, and no Fratzog emblem.
NOTE: All Challenger Shaker and flat hoods have the center rib.

 

[Hemi T/A]

wow , very good details . thank you