PHILTOP Catalytic Converter Stainless Steel Shell Fits Frontier 2005-2018 4.0L, Pathfinder 2005-2012 4.0L, Xterra 4.0L, NV2500 4.0L, NV1500 4.0L Catalyst Convertor

Fit just like factory on 2005 4runner 4.0 V6.

Bought them in febuary and I already replaced them again, Oriellys is more expensive but the warranty is way better than this, fit and quality was terrible, if you want headaches down the road then buy these cats.

Great price and quality part. Installation went smoothly. The only thing I believe would make this even better would be better quality flange studs and nuts.

The pipe that slips over the existing pipe and is supposed to just clamp down with the included clamp, is too big. It cannot be clamped down far enough to make a seal with the existing exhaust pipe so it has to be welded. Other than that, seems ok.

These catalytic converters were fairly easy to install without modifications. Get some flange bolts in case yours break or are deteriorated. You may need up to four for two flange assemblies. I still have a CEL for a cat fault. I did replace all the O2 sensors. Not sure if it’s the cats or O2s causing the issue. The cats likely do their jobs to reduce emissions and I live in a non inspection area so I’ll bypass the O2 signals from the sensors to get the CEL to disappear. These were installed on a 2016 Explorer.

One thing to know is to not undo the factory joint between the muffler and the catalytic converter , the pipe is large enough to slip over 2 layers of the old pipe. Just cut it off with a saw and it goes right over the top of everything. I didn't know about and it, it gave me a little bit of trouble that way, but it fits great and works great.

The holes on the engine do line up however when it comes to bolting the exhaust to it only 1 of 3 holes line up downstream. Beware of this product and you better be handy. I am having to drill out where the studs would normally go and just use bolts and nuts.Also you will need to cut the heat shield in order to get bank 1 o2 sensor in.If I had this knowledge going into this, I would have just kept driving with the code on! A 1.5hr job has so far taken me 3+ and I am not even done.AVOID!

Middle support bracket was welded in the wrong place, perhaps there is a difference in the mounting between the Subaru models this was listed to fit. Mine was a 2008 Outback.Turns out this exhaust with it's Catalytic converter was the culprit making my Outback anemic. Symptoms are: No Check Engine light, No fault codes, car does NOT have a "misfire". Idle is fine. When acceleration is attempted, it greatly struggles to get up to speed. Could barely hit a speed above 40mph.Also remember, on these Subarus, this is not the only Cat; there is one on the front header configuration. It will cause the same symptom. If your car has these symptoms and has the stock exhaust, I would highly encourage you to change BOTH the front header with Cat and this exhaust with it's Cat. My Subie started exhibiting a gradual lack of performance at about 150k with the stock exhaust. Most confusing is that the degradation of the Cats is so progressive that it will start occurring and you think, "this car is a dog".Now this car has New Life with BOTH Cats changed. It is quite the difference!