This is strange......just took another look at photo of my friends gasket that was purchased a couple of months ago and no ribs on his.
Like I said earlier it came in a new style package though. Must be a mixture of product out there right now.
Hey Mike, its Trent. That set I bought a few weeks back is an old set a member had sitting on his shelf, so no telling how old they are. The set I got from Cruz up at RC's in NC came in a very different packaging. Wish I still had those gaskets to look at them.