I just installed the firm feel set up in my sig car but no driving yet. I also switched out the 'made in Mexico' saggy, baggy Mopar leafs the original builder used for some Espo units. Anyway the sway bar install wasn't bad. The main problem is drilling the holes for the frame rail brackets. Unless you drop your exhaust pipes where they go over the rear axle, you cant get a drill bit to the inside edge of the rail. I drilled from the outboard side and managed to hit most of the hole in the bracket on the far side. Also firm feel gives you 'self tapping' short bolts to mount the frame brackets to the rails. It doesn't carry a bunch of weight but I decided to buy some bolts and nuts and thru bolted the brackets.