California Air Resources Board (CARB) Certified: No
Specification
Engine Displacement (Metric)
L4 2.5L
Location
Front
Emissions Regulations: This product is not C.A.R.B. (California Air Research Board) approved.
Install Tip: You may be required to reset the vehicle computer after installation of this part.
Item Condition:New
Attention California Customers:
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
Lifetime Warranty
This item is backed by our limited lifetime warranty. In the event this item should fail due to manufacturing defects during intended use, we will replace the part free of charge. This warranty covers the cost of the part only.
We cannot ship this item to California or Colorado, as it is not California Air Research Board approved.
In the state of New York, this item cannot be installed on California emissions equipped vehicles.
In the state of Maine, this item cannot be sold for or installed on a 2001 model year or newer, California emissions equipped vehicle.
Emissions information can be found on a tag under the hood or from a dealership based on your VIN.
FREE Shipping is standard on Orders shipped to the lower 48 States (Contiguous United States). Standard shipping charges apply to Hawaii, Alaska and US Territories.
Shipping is not available to a P.O. Box, APO/FPO/DPO address, US Territories, or Canada. Shipping to: CA California, CO Colorado, NY New York or ME Maine is prohibited due to state emissions regulations.
Expedited is available on checkout to the United States, excluding Alaska, Hawaii, and US Territories.
How to Replace Exhaust Pipe with Catalytic Converter 2002-06 Nissan Altima
Created on:
Tools used
12mm Socket
14mm Socket
Jack Stands
Acetylene torch
Angle Grinder
Ratchet
Floor Jack
1. Removing the Catalytic Converter Intermediate Pipe
Raise and secure the vehicle
Remove the 14mm nuts from the springs at the front of the pipe
If you cannot easily remove the nuts, heat them with a torch
Have a fire extinguisher on hand in case of an emergency
Remove the two bolts from the rear of the pipe
If they will not remove, cut them with a torch
Let the pipe cool down
Separate the pipe and pull it down and off
2. Installing the New Catalytic Converter Intermediate Pipe
Use a grinder to smooth off any torched areas
Use the grinder to smooth off where the gaskets mount
Hang the new pipe in place
Insert the donut gasket into the pipe
Line up the pipe on the stud on the front end
Put the springs into place at the front of the pipe
Tighten the 14mm nuts onto the springs
Put the gasket into place at the rear of the pipe
Put one bolt through the pipe flange and gasket, and hang it in place
Hold the pipe in place with vise grip pliers
Fasten a nut onto the first bolt
Reposition the vise grip pliers if necessary
Insert the second bolt
Fasten the nut onto the second bolt
Lower the vehicle to the ground
Start the vehicle
Listen for any exhaust leaks
Tighten any nuts or bolts if necessary
Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.
Hi, I'm Don from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.
In this video, we're going to replace the mid-pipe, which runs from the exhaust manifold, or top exhaust catalytic converter, down and back through the secondary catalytic converter. You'll need a new assembly from 1AAuto.com, 12 and 14 millimeter sockets and ratchet, vice grips, jack and jack stands, and based on the condition of your vehicle, and we'll show you what we mean in minute, you may need a torch and grinder.
The pipe that we're replacing runs from the front. We're going to attach this to the manifold, right back on the flex joint there. Right here is the flange. These are probably 12 or 14 millimeter bolts. You can tell that they're very far gone on our vehicle. We couldn't even get a wrench or anything on them to twist them, so we ended up using a torch. If yours are in this shape, you may want to consider whether this is something you want to tackle on your own. We actually have difficulty from the start. These springs have 14 millimeter nuts on the ends of them and you want to go ahead and remove these. On our vehicle, they don't move, so we have to resort in using a MAPP torch to just heat them up. Whenever you're using a torch, make sure you do have a fire extinguisher nearby just in case. Now, you can see they're very hot, so they'll come right off. You want to make sure you do not break the studs because you'll end up needing to drill them out, possibly, and it could cause more problems for you. We do the same thing on the other side, heat it up and remove it. For these bolts, there's no way to get a socket on them, so we use an oxy-acetylene torch. We just cut them. Once the bolts have been cut, you can pull this apart. You do want to let it cool down first. Then, just pull it down and out of the way. Use the grinder to clean up the torched area. You want to make sure that you do this on both sides and also make sure it's nice and flat where the gasket's going to go.
Now, put your new assembly up into place, make sure your donut gasket is in place, and then you just want to line up the studs on the front end of the assembly, push it up into place. Now, replace those springs and just twist on those 14 millimeter nuts to secure them. Now, just tighten up those nuts. Now, take the gasket, put the bolt through the flange and the gasket and into your new catalytic converter mid-pipe. Then, using a pair of locking pliers, we just clamp it together just so we can get it started. Now, replace the nut. If necessary, reposition your locking pliers just so you can get through and get the bolt through. We'll just fast forward as we put the bolts in and put the nuts on the other side and tighten them up. Just make sure everything lines up and everything's tight. Start your vehicle up, listen for any exhaust leaks anywhere and tighten any bolts if necessary.
We hope this video helps you out. Brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.
33136
In Stock
Product Reviews
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4.25/ 5.04
4 reviews
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No hardware
Camella
October 13, 2017
The part was great but they should have included the nuts and threads and nuts that they cut off in the video on how to install it. Could have purchased the part for cheaper but the video was a plus so I brought it.
Exhaust replacement
Stephen
March 1, 2019
Part purchased and supplied by 1 A auto was easily installed, fit right and of comparable quality to the convertor I replaced
Mark
September 5, 2020
Good fit . Easy to install, hardest part lifting the car.
Functions as expected, good price
Paul
March 11, 2022
Fit great, had that right gaskets. 80% of the time was spent on getting the old part off, getting this new one installed was easy.
Only suggestion is that they should offer a package deal that comes with the four bolts as well since they are typically so corroded that they have to be cut off.
Also the picture is rather misleading, the actual part looks like it was welded up in some guys back yard. Functions as expected but looks rough.
Customer Q&A
My check engine light came on an read the code po420. Is this catalyst system below threshold 1???March 17, 2016
George M
10
Not enough details in just a PO420 to answer your question.
March 18, 2016
Brian F
10
Do you have any videos on an 3.5 Altima Exhaust system replacement.
November 3, 2017
Gilbert A
Does it includes gasket?September 7, 2016
PYIN N
10
No it does not include gasket or any hardware!! I spent an additional 40$ for that,but still saved 200$ from what kost or firestone wanted!!
September 7, 2016
JOE R
10
No, not included
September 7, 2016
Brian F
10
No
September 7, 2016
Thatcher H
10
it does not include gaskets
September 7, 2016
Mark M
10
No
September 7, 2016
Scott S
Will this part fit nissan altima s 2005?November 25, 2017
Jie G
10
Yes, I installed this on my 2005 Altima without any issues.
November 28, 2017
Scott S
10
yes it fit mine fine
November 28, 2017
JOE R
10
Fit My 2004 perfect
December 2, 2017
Mark M
Customer service
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Nissan is a registered trademark of Nissan Motor Co., Ltd. 1A Auto is not affiliated with or sponsored by Nissan or Nissan Motor Co., Ltd.See all trademarks.
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