Originally Posted by MashinA

I was told by the dealer here that aftermarket exhaust voids the cats warranty :/

Originally Posted by EPA

What Reasons Can the Manufacturer Use to Deny a Warranty Claim?

If your vehicle is within the age and mileage limits for the
applicable emissions warranty, the manufacturer can only deny coverage
if evidence shows that you have failed to properly maintain and use
your vehicle, causing the part or emission test failure. Some
examples of misuse and malmaintenance include the following:

* vehicle abuse such as off-road driving or overloading; or

* tampering with emission control parts or systems, including
removal or intentional damage of such parts or systems; or

* improper maintenance, including failure to follow maintenance
schedules and instructions specified by manufacturer, or use of
replacement parts which are not equivalent to the originally
installed parts.


What Should I Do If My First Attempt to Obtain Warranty Coverage Is
Denied?

If your first attempt to receive emissions warranty coverage is
denied, you should do the following:

1) Ask for a detailed explanation, in writing as to why emissions
warranty coverage was denied; and

2) Ask for the name(s) of the person(s) involved in the decision
to deny coverage, including anyone from the manufacturer's
regional or zone office; and

3) Ask for the name(s) of the person(s) with the manufacturer you
should contact to appeal the denial of coverage under the
emissions warranty.

4) Contact and, if necessary, write to the person mentioned above
requesting coverage and giving the basis for your request. Repeat
and continue the appeal process until you are satisfied or have
exhausted all means of appeal.

Originally Posted by MashinA

I was told by the dealer here that aftermarket exhaust voids the cats warranty :/