Features:

  • Made of cast aluminum and comes with a natural finish
  • Ideal for marine and off-road applications
  • Installs on to the exhaust crossover without modifications
  • RPM ranges from idle to 5, 000
  • Designed for use on emissions equipped vehicles
Cures the Olds 455 center port issue

These are cast iron, and will require quite a bit a of grinding to fit. They go in the head's center exhaust port. Got mine to fit perfectly. Use the Mr gasket intake gasket with the port blocked off, and you won't have to deal with cracked manifold and blown gaskets any more. You will need at least an 8" bench grinder.

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