Dorman 674-940 Exhaust Manifold Kit - Includes Required Gaskets and Hardware Compatible with Select Chevrolet / GMC Models

Good product, works as expected. This was a no-problem part to install. It fit right on as expected and solved the problem caused by the wear and tear of the previous one. There has been no problem from the time of its installation up to the present. It's been good for the low price.

Identical to Oem and fits the same it's nice and solid with a powdercoat for add protection its casted and machined flawlessly.

Me trabajo perfecto

Great price and delivery product fit just fine

Packaged well, comes with exhaust flange nuts and heat shield screw, manifold to cyl head and flange gasket. I read a lot of reviews that the replacement manifolds cracked after only a short time so I broke the manifold in gently, By that I mean, after installation I verified everything was right, and started the engine for about 1 minute and then shut down. I let it cool until it was cool to the touch, about 30 mins. I did this a few more times progressively going longer, and then went around the neighborhood gently driving it and came back and let it cool. Then it was ready for my wife to race, I mean drive it. Worked great. So far it's been a few months and no issue yet. The only problem I had was the crush gasket that goes on the outlet flange was damaged. It looked like the box had been dropped in shipping and the weight of the manifold dented the crush gasket. Luckily I saw that before I was ready to install and I had one on order for when I was ready. I'm sure they would have replaced it but I though for the few bucks it would be quicker to re-order vs do a warranty ticket. Still way cheaper than the local parts stores. So check all the contents before you are ready to install so you can either ask them to send you another or buy it.

Had a crack in the manifold causing my engine light to stay on. Also burning my O2 sensors in the manifold. I was a little hesitant to get because of the price. I received it had my mechanic install it. Everything aligned perfectly. Definitely a solid product. I suggest if you purchase this also get the O2 Sensor for as well. All in all great buy.

For the price this worked just fine. I could have bought the Delco brand one for twice the price but with the miles on the motor it just didnt pay. How long it will last is anyones guess. It is working for now. I just hope this one doesnt crack like the last one did. At least not for a while.

Dorman may end up being your only affordable source of these manifolds. The OEM manifolds are notorious for cracking beteeen the 2nd and 3rd runners near the connection for the catalytic converter. There is an aluminum shield on top of the OEM manifold which hides the crack, so it can take a while to realize what is going on. There are a lot of nice features with this manifold, including flat mating surfaces, a new gasket, a new stainless steel flange seal, and new nuts for the flange studs. However, when I had removed the old manifold, cleaned everything up, and was trying to put the new Dorman manifold in, I found I couldn’t screw the nuts onto tne bottom row of studs to attach it to the head. In checking it out, I found that the Dorman was not an exact replacement for the engine. It is too big. It has too much cast iron on each end and has to be ground down to fit. I don’t have a garage to work in, and the weather here got very wet and cold, then Christmas and New Years intervened. The next sunny day I will grind the excess cast iron off the ends of the manifold and re-install it. I was warned about Dorman, and found out the hard way, but by that time the GM version was not available, except from dealers. I’ll take what I can get and make it work.

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Satisfait

This is better than the original fits no problems. But make sure you have right tools to start

Top quality replacement part that came with everything needed from gaskets to hardware. Arrived early and works as expected.

Replace my broken exhaust manifold on my 2010 chevrolet equinox with this product. Ang i got no problem installing it.