HS4 Insulating Spacer Block - 30mm

HS4 1.5" SU carburettor insulating/ spacer gasket 30mm thick made from Phenolic, mounts against the inlet manifold, this will require gaskets to fit (AUD2219X)

These phenolic blocks reduce heat transfer from the engine to the carburettors, by insulating and also spacing the carburettors away from the exhaust, resulting in less fuel vaporisation.