Shock waves work good if you dont want alot of lift. They are bound to a certain lift and drop ratio. Great for some cars bad for others. Like said before look for any interference around the bag. I have been doing air ride for a living for about 5 years. I know the great parts to have and the not so great. But this is my opinion too. Nothing is cheap when it comes to someone customizing there ride. So make sure you ask alot of questions and have someone that is willing to talk and explain what to do. If you look around here in the shop areas you will find pics of what I do for fun and it will show you what you can do with air and how much it can be in the end.