Wish I would done better research, guys with GM engines tend to have less issues. Mine have been nothing but an absolute PITA. I want to swap in better ones, but would rather re-do my suspension first. But the the quality was terrible, in order to just INSTALL them, I had to modify the bolts they included to fit onto the header flanges because the heads were to big and would be touching the header tubes. This was on an engine stand too none the less, couldn't imagine with engine still in car.Win said:Yeah i have also heard of some horror stories from other sites. I would steer clear of them.