It took 1.5 hours to install. Be sure to watch the installation video during installation. I had a video on an iPad right next to me in the garage. I also used a "T-Splitter" because I wanted to inflate the shocks with just one stem. You can purchase this as an accessory. I also bought a pipe cutter. Another helpful tip is to measure the height from the ground to the top of the wheel arch to get a baseline. Then, once your load is applied, pump up the shocks to bring the load level back to your base height. One of my boat trailers requires 25 pounds. and another 70 pounds. Here are the links for accessories: https://www.amazon.com/gp/product/B00CD8HB1I/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1https://www.amazon.com/gp/product/B001F532PY/ref=oh_aui_detailpage_o02_s01 ?ie =UTF8&psc=1
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