Use these gaskets where sealing problems exist (or are likely to exist) between the head and manifolds, particularly where an extractor manifold is used, as these usually have a slightly uneven face due to the heat generated when the pipes are welded to the flange plate during manufacture.

 

This product has an inlet port hole diameter in the gasket of 43mm to suit TR3 cylinder heads. The same gasket size was used by Triumph through to the TR4A.