i upgraded the exhaust valves for the 2.7t from sodium filled valves to stainless steel valves but i kepet the oem springs
so what is safe rev limter for the these stainless steel valves

I'm running 7300rpm for 60kkm already. Some of that with hardcut, no issue at all. I'm not saying its safe, just that it doesn't necessarily explode. Im running 2.8 heads and cams, 2.7 exhaust springs and valves.

thank you guyes
so its all about springs not the valves to gain more rpms no matter sodium filled valves or stainless steel valves i have to get more strengt springs like Ferrara Springs kit to privent valve float from happning,
actually the stock rev was set to 6800 from the factory, the ecu is aa-box flashed to m-box so i want to set it to 7200 is it ok
also the NA heads like 2.8 or 2.4 came with stainless steel valves are the springs from these heads are  any stronger then 2.7 stock springs   

ok thanks prj