Recently I've decided to replace my valve cover gasket due to the oil burning smell coming from it. I got an idea about buying some cheap cams, the autotech 262s. I have some questions about it. My car has 145k miles on it. Can i just buy the camshafts or do i need valve springs/lifters. From what i've heard I shouldn't need anything but the cams if i go with the 262s. As far as performance im not to worried. I am worried about the car running like **** afterwards. Am i going to need to buy a tune for it or will it run fine without one? Thank you if you actually read this all.