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Set of the (3) rubber o-rings that go between the balance tube and the upper intake plenum.   The original o-rings become hard and brittle over time often flattened and incapable of a strong seal.  We recommend replacing these o-rings to provide an air tight seal against both the vacuum and boost pressures that they may be subjected to in a Z32 intake manifold. 


  • (2) larger diameter o-rings 
  • (1) small


  • 1990-1996 Nissan 300ZX (Z32) 


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