hey guys I am building a GSR head with buddy club spec IV cams. I have supertech valve springs and retainers. I have stock valves in good condition but the motor was boosted but they are still in good condition. Do you think i can reuse them safely revving to 8.8k or 9k or wherever my cams rev to daily?

 

how many miles are on them/how old are they?

 

unknown. the guy I bought the motor from said 140,xxx but I don't know for sure. They are in good condition though.

 

I wouldn't chance it if u have no idea.

Oem valves r cheap, maybe research flat face exhaust valves

 

They might look good but metal fatigue is pretty hard to spot with your eyes. It's better to replace them and not take any chances, but obviously you can use them with the understanding that you could experience a failure at some point, especially if you plan to drive the car hard with a lot of high RPM use.