Basically, you're going to shorten the life of your engine and transmission the more power you develop and the harder you drive it. For myself, I'm willing to accept that I may only get 150-200K out of it, but I'm going to enjoy every minute of it. It's all a matter of your tolerance for unexpected breakdowns and the costs that come with them as well as waving good-bye to your warranty. You just have to decide what balances the equation in your situation. For the record, my truck has about 50K miles on the current set-up and is driven daily in full-on mode - usually hitting peak boost about 1-2 times daily - no breakdowns so far, DTT transmission with billet shafts performing flawlessly day after day. I feel like a kid everytime I go somewhere Oo.