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The Vibrant 2837 4″-4.5″ Silicone Reducing Coupler features a 4-Ply Silicone construction with a 4″-4.5″ I.D. and 3″ overall length. The Vibrant coupler features a 1-year limited warranty. They are perfect for replacing old worn boots, or building your own custom turbocharger setup or intake system.


  • 4″ Inlet
  • 4.5″ Outlet
  • 3″ Overall Length
  • Burst Strength: 40 PSI
  • Multiple Colors Available

Black – 2837
Red – 2837R
Blue -2837B


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