[wl_napier]

Does anyone know how large the spigots of stock harley twin cam cases can be bored without causing oil leaks or other problems?

[hotroadking]

Are you talking about 88 cyl?

Biggest I've seen are 95 inch

There is a company that will go 98 but I think they press out the old liners and in some new ones.

If it's a newer 96 you can go 103