How much does it cost to replace lugs?

The safest way in to fix all of the damage, like if the rotos hit the pavement, make sure the control arms and steering knocles dint get damage, and you probably need to replace all the lug bolts along with the nuts. If they are stripped, and broken they were probably tighten too much too many times before, and they became weak and could not be tighten propely anymore. The engine on a 4 cylinder car is usually in line so you just say 4 cyl. not V4, thats for engines that have opposing cylinders like in a V.