If you take out the cats, they cannot remove or replace the offending pipes.
Intakes are grounds for denying internal engine warranty repairs.
Boost controllers are grounds for engine warranty denials, as well as transmission failures.
Failure to use 91+ octane is grounds for denial
Drag racing, clutch drops, or poor shift technique are grounds for transmission denial.
Non-OE pulleys are grounds for denial.
Those are the ones in the gray area. Obviously, making 350+ hp will void your powertrain warranty.

Cat-backs will not void anything.
Wheels are ok.
Basically anything suspension is ok, as long as you don't make claims on stuff directly related to it, E.G. clunking noises or worn out bushings.
Turbo timers will only void coverage of any damage you do to the electronics while installing/uninstalling them. They do not void the powertrain warranty.

Also, STi/SPT parts ARE NOT covered under warranty, and can be used for denial of coverage in some ways. Putting on SPT springs does not mean your engine is not covered, however.

Research the Magnussen/Moss (sp?) Warranty Act. Basically, it is law that a manufacturer must PROVE that damage to your car was caused DIRECTLY by your mods.

I have heard rumors that dealers are denying warranties due to having K&N-type filters. This is specifically illegal UNLESS your dealer is giving them away for free. This applies to all "normal wear" items like fuel/oil filter, pads/rotors etc.

This is all from a legal standpoint. I'm sure someone has every single one of these mods and got coverage, while others had none and were denied. Dealers will do whatever they think they can get away with, this just helps to let you know what you can challenge.

 

Okay, I just realized you are in Canada. The MMWA obviously does not apply. I have no idea what guidelines Canada has. sorry dude.

 

"Good idea" and "warrantable" are sometimes 2 different things. SOA has a reputation for looking for excuses. While the chances of them noticing a reflash are small, it's still messing with factory programming- which is certainly grounds for voiding the warranty. The warranty only covers materials, workmanship, and the labor to repair any failures thereof. If you mess with their stuff, they aren't liable anymore.

 

I wonder if an exhaust system (uppipe, down, catback) will void an AC fix. I just noticed that my air conditioner was busted AFTER we installed everything and im not about too remove everything again so that I can get it fixed. It sucks, theres all this gunk near my ac lines and over the top of my intercooler. I know its more than a simple leak cause we tested the hi/low pressure and theres nothing. Then we tested the compressor itself and we got nothing. When I hit the AC switch my idle doesnt change or anything, the light for the ac doesnt even turn on. I hope they will cover my damage since it happened before the whole exhaust shindig. Hey BAN SUVS what do you think, can the whole exhaust system be grounds for denial to fix my AC? I doubt theyll beleive me if I told them that it happened before hand...im 21, asian...im assed out.

 

There are no legal grounds for blamig a failed AC line on your exhaust. The dealer could try it, but if they did they would be breaking the law.