674-933 New Catalytic Converter Compatible with 2007-2012 Nissan Altima 2.5L L4 with Hardware (OE Replace:14002-JA91E)

The quality and price is AAA+. However, the manifold has two lower heat shields and a third top heat shield. The two lower shield bolt pattern mostly lined up, but one hole on the shield did not and required modification to make the hole larger so I could align. My best tip would be to install the two lower shields before installing to the engine block, and to start the bolts, but do not tighten or snug until you have all bolts in so you can shift the heat shield while aligning. Once all bolts are in, tighten down. The upper heat shield, has to be fastened after the manifold is attached to the engine block making the shield bolt hole alignment much more difficult. The bolt hole stands, were not welded at the factory angles as the OEM manifold, so starting the bolts down in the engine compartment is challenging. Again do not tighten and of the bolts, only start them as you will need to shift the heat shield to start your bolts onto the threads for the lower holes. They did not align perfect, and had to use my camera phone to alight he shield and mounts on the manifold. A half hour of cussing and finally got the shield on. Lastly. The manifold bolts on the OEM manifold exhaust where the mid section pipe connects have Torque bolt heads. The manifold bolts that came with this item, were bare and had no head to tighten. You have the hand fasten the bolts and then, install the nuts and crank them down with a wrench. These included bolts really need a head on them to tighten before installing the mid section flex pipe. This could have been easier with a better hardware kit, and the mounting holes welded more precisely. Hopefully I wont have to take the heat shield off again anytime soon, because putting it back on is a headache. I would also recommend getting new O2 sensors while you have everything broken down. Also, the factory oils on the surface have to burn off for a few days of driving. This new manifold, will smoke as the heat load burns the surface oils. Do not be alarmed when you see smoke coming from the manifold, this is normal and will burn off. Let the car idle for a bit, with the hood open and the worst will burn off.

I was looking around for this piece and there was some that were a lil cheaper than this one. I made my decision on the very few ratings it had (which were really good). The price was still a GOOD price compared to others. I read a few reviews on the heat shield weren't lining up on the replacement part. Well this one fit really good actually. Try placing the heat shield first before reinstalling the alternator makes it alot easier. Everything fit well, nice and quiet no problems yet. So far it's a good replacement part in my book for the money. 👍

Work well on my daughter’s 2010 Altima but the threads on the exhaust side weren’t cut correctly.... I recommend running a tap through them all to clean them out.... or at least check them prior to install...

I had a check engine light on. I tried a hack online to try to correct the issue, but after inspecting the manifold realized it had to be changed. I got this and after installing it the car is quieter, runs great and no more check engine light.

Cleared up my check engine light and worth the money and time

great fit and a direct replacement. The only issue I had was there were 2 welds with pin holes that had to be welded up to fix a exhaust leak.

Es igual que el original que trae el carro es lo mismo lo único que tienes que checar muy bien Es que las soldaduras vengan bien porque a veces no soldán en los empates de los tubos Y ese es el problema con estos pero muy buen precio y es igual que el original que trae

So far no problems