SC CIS Intake Manifold Sleeve Question...
 

I am looking to replace my rubber sleeves that attatch the airbox to the intake runners. I found the part here on the pelican site. I was wondering what the differences were between the 78-79 and the 80-83. Is one better than the other? There is a price difference, but they look the same. Does one last longer than the other?

Here is a link to the sleeves.

As always, any comments are greatly appreciated.

I believe they are different size because the runners are different size.