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Review on Dorman 674-659 Exhaust Manifold with Integrated Catalytic Converter: Non-CARB Compliant | Best Deals by Darius Carraway

Revainrating 4 out of 5

Some good stuff for catalytic converters and parts

Works great! Since the heat shield screws mentioned do not all match in all other reviews, you will have to drill new holes. If you have an Altima 04, buy an oxygen sensor plug in advance as it has an extra hole for the oxygen sensor that your car doesn't have.

Pros
  • Easy to set up
Cons
  • Upgradeable