Remember: the engine creates the emissions, the exhaust system is the path from which they exit.
A freer flowing exhaust will not do anything to inhibit emissions expulsion or to increase emissions output, all of which is controlled by engine management and the catalytic converter(s).
Repairs will be made with parts of like kind and quality.
It is expressly understood that replacement parts and/or components need not be new, but may be used or rebuilt, which will be guaranteed serviceable.
A “breakdown” or “mechanical breakdown” means the failure of any original or like replacement part covered by this Limited Warranty to work as it was designed to work in normal service.
However, reduced operation or reduced performance due to normal wear and tear shall not be considered a breakdown within the meaning of this Limited Warranty.
So, if you’re not sure how to install a part (or if you’re trying to rig something together), it might be wise to get some professional help.
For instance, some people believe that adding a simple performance part (like a custom exhaust or after market air intake) will somehow endanger your warranty.
Limited Warranty Coverage This Limited Warranty is mechanical breakdown coverage.
If any of the parts identified as Covered Parts in Attachment A (below) break down, then for a period of 12 months from the date the vehicle was purchased or 12,000 miles (whichever occurs first), Regal Car Sales and Credit will at no charge repair or replace any such part(s).
This is a grey area unfortunately; In essence, you are modifying the vehicle away from standard, so looking at your terms of warranty directly related components are being invalidated.
We recommend you read through your terms of warranty.