Dorman OE Solutions Exhaust Manifold 674-439 Review

Dorman OE Solutions Exhaust Manifold 674-439
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This is my second Dorman manifold. I put the first one in a 1997 Honda Civic LX and the Second in a 1999 Honda Civic LX. The instructions are very general and are made for all of the different combinations of exhaust manifolds and catalytic converters. They say there are serrated flange nuts to attach the two parts but all I found in the box were normal grade 5 nuts. I purchased a few flange nuts and everything went together easily. There are also nuts and bolts included to attach a heat shield. On this catalytic converter the heat shield was pre-attached
Installation was pretty easy. The lower oxygen sensor was completely seized on both cars and had to be replaced. If you live in the rust belt expect to replace it. The Dorman is a little slimmer than the OEM version so it slides into place easily. Use a torque wrench so you don't crack the manifold. The car is much quieter now. The first installation took about 4 hours and two trips to the auto store and the second was only 2 hours with no trips. Overall, a good product and much less expensive than anything else around.

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