Ask mate, I recommend that to you as well seriously. I'm never taking my car back to toyota to be serviced anyway. I'm over it, especially after being enlightened by xoom. Warranties mean sweet bugger all. Get all the problems ironed out of your car warranty wise, then you've used up the usefulness of it. It's a sales tool, nothing more. I should know, I used to sell them with computers at Harvey Norman. The benefits of the bolt on NIKICH is the fact that 'if' you are defected (which we shouldn't be...it's not stupidly loud until up top...then again so is the stock one) you can just pop the stock back on. Can't see that happening though. They pick on cannons usually, not actual mufflers.