Review on 🚗 Dorman 674-439 Catalytic Converter with Integrated Exhaust Manifold for Honda Models - Non-CARB Compliant: Product Review and Buying Guide by Michael Rodas

Some nuts were the wrong size. I had to buy 9 nuts to attach the distributor to the cylinder block. The nuts on the underside of the catalytic converter hardly tightened during the first few threads. The seal between the catalytic converter and the downpipe was also a thin metal disc. The one I removed was a big, old, weak gasket. It fits, but I don't see a complete seal. After installation, there was a smell of exhaust gas in the cabin. In addition, the collector itself is solid. I'll probably have to take the underbody back off and put in the correct gasket that should have been included, but I think this header will survive the rest of the engine. - 1 star for odd nut sizes - 1 star for missing gasket. Should have ordered some of these items separately but all items in the picture were definitely not included. The ones I had didn't fit.