2002-06 Nissan Altima Front Exhaust Pipe with Catalytic Converter Cateran Inc - 1ACCD00255

Frequently bought together

Warranty & Shipping
How-To & Tools
Product Reviews
Vehicle Fit


  • Replaces Front Exhaust Pipe with REAR converter
  • Replaces dealer part numbers: 20020-8J000, 20020-8J000, 20020-3Z800, 200203Z800
  • Details:
    • Inlet:2 Bolt circular flange
    • Outlet:2 Bolt circular flange
    • Oxygen sensor provision in front neck (includes Block off plug if not needed)
  • High quality 409 grade stainless steel
  • Certified for the following agencies:
    • US Environmental Protection Agency (EPA)
    • Ministry of Environment, Ontario & British Columbia - Canada
  • Built to strict quality control standards

Item Condition: New

5 Year Warranty

This item is backed by our 5-year warranty. In the event this item should fail during intended use, we will replace the part free of charge.

Emissions Note:

Due to state emissions regulations:

We cannot ship this item to California, 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.

  1. step : Removing the Catalytic Converter Intermediate Pipe (0:45)
    • 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. step : Installing the New Catalytic Converter Intermediate Pipe (3:12)
    • 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

Tools needed for replacement:

    General Tools

  • Jack Stands
  • Floor Jack

  • Pliers, Cutters & misc Wrenches

  • Vise Grip Pliers

  • Ratchets & Related

  • Ratchet

  • Sockets - Metric

  • 12mm Socket
  • 14mm Socket

  • Specialty Tools

  • Acetylene torch
  • Angle Grinder

3.50/ 5.0
2 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
No hardware
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.
October 13, 2017
Exhaust replacement
Part purchased and supplied by 1 A auto was easily installed, fit right and of comparable quality to the convertor I replaced
March 1, 2019
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
My check engine light came on an read the code po420. Is this catalyst system below threshold 1???
George M March 17, 2016
Not enough details in just a PO420 to answer your question.
Brian F March 18, 2016
Do you have any videos on an 3.5 Altima Exhaust system replacement.
Gilbert A November 3, 2017
Does it includes gasket?
Pyin N September 7, 2016
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!!
JOE R September 7, 2016
No, not included
Brian F September 7, 2016
Thatcher H September 7, 2016
it does not include gaskets
Mark N September 7, 2016
Scott S September 7, 2016
Will this part fit nissan altima s 2005?
Jie G November 25, 2017
Yes, I installed this on my 2005 Altima without any issues.
Scott S November 28, 2017
yes it fit mine fine
JOE R November 28, 2017
Fit My 2004 perfect
Mark N December 2, 2017
Year Make Model Description
2002-2006Nissan Altima Nissan Altima L4 2.5L Front Exhaust Pipe with Catalytic Converter
Only 9 left in stock
Part 1ACCD00255
In Stock

Order must be placed by 4pm ET
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Estimated Arrival Cost

Deliveries made to PO Boxes and FPO may take longer. See our Shipping & Delivery for more information.

Brand #: 33136