Inliners International Forums General Discussion Engines What are these?

Look for the photo in Leo's book of a head that Leo had made that is described as a sissal lump head for a turbo application. The lumps are in epoxy but its a lump head just the same. You will notice that that head has the smog ports. So a bolt in lump kit is going to work just fine. I currently own that head.


Finding plugs for those fittings can be a bit challenging. They are an odd size. What you can do is drill the inside of the fitting to a npt plug size, dont go all the way through, use a bottom tap and tap for npt threads, then install a hex npt plug with some high temp sealer. I had to fix that head that way because the plug was messed up when I got the head. So that is one approach to using that style head.