Fairly easy to install. It took me a while to figure out which screws were for what. The only drilling was 2 holes 5/16 for Schrader valves. I installed it myself in 4-5 hours at a slow, methodical pace. Airbags have changed the rules of the game. Towed a 14,000lb fifth wheel and did the last part of the ride in winds in excess of 30mph. Stability was fantastic compared to the lack of airbags. I wish I had done this many years ago.