[240sxspeedracer1]

i think ur mech jerked ur chicken.  if u look on 240sx.org, ull see that somebody quoted that parts would only come to around 100 or so bucks.
Then, u go to a mech u trust and know that he will give u a good deal and have him do it(my mech would do the installation for 200)
so ummmm, I say it costs in the neighborhood of 300 bucks give or take 50.  Whatever u do, dont go to a nissan tech, hahaha, their labor would probably be 600 or more.