Hi David, I am pleased to assist you. These helper springs can typically add approximately 1 to 2 inches of additional height when installed, depending on the specific vehicle and load conditions. These are designed to enhance the rear suspension of vehicles by adding support and reducing sag. If your vehicle is compatible with the information provided on our website, you can use the link below to order while the part is in stock. Your order will come with a 30-day post-purchase price match guarantee. I hope this helps and enjoy shopping! https://www.carparts.com/helper-spring/supersprings/s99ssa4?can=CPGG4850_CSQA_20241023