This manifold adapter allows the use of a stock style CRF/XR50 intake manifold on our old Perimeter Frame kits. Basically it straightens out the intake to better fit between the frame spars. It goes between the OEM manifold and the cylinder head. It bolts down to the cylinder head, twisting where the manifold bolts on.

This is the only style adapter we have, but some people might find it useful for other applications. See the dimensioned PDF below to see if it could work for you.