The pre-1978 early manifold, is sealed with o-rings between cylinder head and manifold.

This kit includes adapter rings that allows you to convert to the early style pre-E78 'o-ring system' to the late style L78-84 'band style' system.

Includes adapter rings that will work with: o-ring heads and o-ring manifold, o-ring heads & band style manifold and or band style heads & o-ring manifold.

Kit includes four adapter rings and two stroker adapters to convert stock manifold for longer than stock length cylinders.

Note: Band style seals are not included and must be purchased separately. For band style seals see James 518520 or Cometic 561409.