......you find you need a gasket that you can't find seperate, other than in a top-end gasket kit?
I like to replace these when I port and polish manifolds, and I do more than one at a time typically. This is for the LIM end cap, and seals the cap that is used to re-direct coolant flow throughout the LIM. They get dry and crusty, and the leaks cause the bolts to rust out. There'* no way I'll ship a LIM without pulling this, cleaning the surfaces, and sending it out in good shape. Besides, after I use all the abrasives, it'* nice to be able to clean out these passages, and it'* easier with the cap off:
10 mintues in CAD and file conversion to machine language. 5 minutes to cut each one (made several low-power passes to keep the cut clean). $9 in gasket material (enough to make about 20 of these).
John Wikoff gets a custom gasket installed, and another one riding along in the box for the future (he has another manifold or two). I have a FelPro to install, and a spare for myself, plus the saved file to make more any time.
This gasket material is vastly superior to the fiber OEM gasket. It'* a fiber/rubber composite.