Just so I understand, am I the one you guys are calling stupid? Because I stated that Deaver has a lifetime no-sag garuantee? Ok, this is the nitty gritty details of it. Donahoe offers a no-sag on thier super duty springs. Deaver does not. However, the guys at Deaver are not just some guys who make springs all the time. They also have trucks and rail them. When Deaver makes someone a custom spring, it typically takes 5ish weeks and about $1200. This time is not idly wasted. They R&D the crap out of everything they sell. They WILL NOT let an inferior product out the door. You can call Deaver with your serial numbers of your specific leafs (personal ones, not just Tacoma or whatever) and they can tell you when they were made, the heat treating temperatures, quenching temperatures, metallurgy of the steel, so on. Show me another spring manufacturer that keeps this anal control over their manufacturing process. Unfortunatley, aftermarket springs walk a fine line. One guy wants 15" of wheel travel, while the other wants to lift his truck 2" and tow 6000 pounds. The same spring cannot realisticaly be made to do this. SO, call deaver and tell them what you are going to do with your truck/spring, and they can set it up so it will work for your application. The only reason a Deaver spring would sag is if it was abused. Try renting a rental car and racing the Baja 1000 with it, then telling the rental company that they should have rented you a trophy truck when it breaks. They would charge you an arm and a leg. When you abuse a deaver spring and it sags, deaver will not tell you go to up a tree. They will work with you to correct the problem in the most cost effective and time effective way. That is where my stance on the no sag garantee comes from. Sorry for the rant, just trying to "educate" people. From now on, I will stop using the no sag term if it makes everyone happy. Thanks, AJ