I’ve been searching and there is little information about failures or success with different valves. I was reading that ferrea 6000 are good but they’re not designed to run with a turbo. I was thinking about ferrea comp plus but I wanted to find out if anyone has been running the 6000 or any other for a couple years with no problems. My rsx has 220k miles so I don’t think I want to use the stock valves with 93 lb springs. I’m shooting for ~400 hp to be able to keep stock transmission etc.