Unlike other lifts available on the market that make you disassemble the strut assembly for installation, this lift kit is designed to fit on top of the strut. Why do we do it this way? Because the other lifts can pre-load the spring, making your ride harsher- and they are more difficult to install. Many people who have installed the in-the-strut poly spacers in the past have come to us and asked us why their poly spacers are squeezing out of the strut assembly...its because other lifts aren't designed to take that kind of abuse. You may ask, why don't we make the spacers out of steel like all other leveling kits on the market? We have found that over time, the other "steel" sandwiched/ welded spacers will flex and the steel will rust, and the tolerances on the holes and components are not as tight as we would like. Over time, the other lifts would "pop" meaning the struts begin to move on the spacers. Aluminum used as a strut spacer has proven to be the best material, because it will not rust and has the best characteristics for a spacer of this size. We have done our homework here and come up with an easy to install lift (in 2-3 hrs), with more engineering and components than other lifts have.