Free if you have bolt cutters 
shocks and struts are just reccommended because it'll be a rougher ride without them and it's easier to install everything all at once, but it's not required though...well then i would have to replace the shocks, struts, ball joints too. the guy at the shop wouldnt recommend it, he said it loses performance too and a lot of people have regretted it. i can put that money into something else. just got a cold air intake and a grill delete to install tonight!