used like they had about 3500 miles on them. i found out when looking in to it a little more i have to go junk yard hunting for a 3.5 impala or monte. the dealer denise cracking a mount for one of the bolts that is next to one of the injectors. so it is getting to much air and causing a back flow. if i order one from gm i have a feeling it is going to be expencive. i am going to put up some picks for the intake thats broken i am going to go to the salvage yard that i got that other 3.5 that i had co worker baught it and loves it. i just wish i put it in my monte than sell it. but on the bright side i know now what to look for now but it will set me back for new head lights and tail lights that i want.