What kind of warranty would be left on a 01 anyway? A warranty doesn't cover brakes, shocks, clutch, or any other wear parts. TRD parts cost the most and you don't need TRD unless you just like paying a lot.
I'm not advising the original poster anymore, I'm advising goatmonger, and he has a '07 S with 3 years of bumper to bumper warranty left. If you replace components on a car with factory warranty left with non-factory approved parts and any damage is done to the car because of those parts, your warranty won't cover it.
Best bet for upgrading an '07 and keeping you warranty in tact is to use TRD parts.
Also, the warranty does cover brakes, shocks, clutches and other wear parts. If they fail before the factory warranty is up and didn't fail due to normal wear from operation they are covered, it is the one and only caveat to coverage on wear items. I believe Larry Roll got a belt on his car replaced under factory warranty because it failed before the warranty was up and Toyota determined that it was a defect in the belt that made it fail early.
I got a belt replaced under warranty too. The Corolla probably has a TSB on it. Clutches and brakes are next to impossible to get replaced under warranty. A bad driver, or someone who abuses the car can wear that stuff out in a week, or even a day. I've personally known people who couldn't get a clutch replaced under warranty. I guess it really comes down to the dealer, but things that are wear items need to be replaced just like the oil. The dealer shouldn't be expected to replace them unless it was in the buyers contract.
The The Magnuson-Moss Warranty Act protects car owners from dealers voiding a warranty simply from applying after market parts. It's not as black and white as that. TRD would be a way to get around that, but the extra cost doesn't make it worth it IMO. If anyone is going to put performance parts on a car that has a warranty, then they "should" be smart about it. To not void a warranty, the owners can pretty much only do basic intake, suspension, brakes, wheels, tires, exhaust mods. Power adders can't be added, the engine or ECM can't be changed in any way (at least that the dealer can see). A dealer can void the warranty on the after market part, but not any other part of the car unless they can prove that one part caused another failure.
The Corolla is a budget car. I don't understand why anyone would buy a budget car and then spend lots of extra money for TRD parts. They cost so much more then other high quality parts and the extra cost is the logo. If dealer installation cost are added, then the cost of a corolla could sky rocket.