If you look a few pages down buschur did some false advertising I wasnt happy with… The price for there stage 3 head package was 90% UN installed… They wanted well over $1,000 more then the price of the head package to install, plus I would have had to pay for shipping both ways putting me at around $5,000 for my head… I still bought my valves, valvesprings and retainers off Buschur, just got the cams somewhere else and seems like im saving a TON of money.