Sierra Exhaust Manifold Elbow - 18-1973

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Mfg 18-1973, iboats IB00058512, UPC 030999621078

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Additional Details:

  • Fits: Most early Model 120hp Mercruiser applications

Use With:

  • 18-8508: Exhaust Manifold Mounting Kit/18-2819-1: Exhaust Elbow Gasket

Cross References

  • Mercruiser Stern Drive 39920
  • Mercruiser Stern Drive 39920A1
  • Mercruiser Stern Drive 55538A2
  • Osco 5538
  • Mallory 9-40553
  • Barr MC-20-55538

Fitment Information


  • 120 GM 153 I/L4 1964-1982 4 stroke 4 cylinders 153, cid
  • 160 GM 250 I/L6 1967-1969 4 stroke 6 cylinders
This product fits:

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