Hi guys, amazing build, i need some advise for my build, please see my intro page [b]http://www.ukstarletowners.com/index.php?showtopic=59209 Im upgrading my cylinder head now, i have new valves springs from tuning development, now problem is, will the stock valves, retainers and valve caps hold down 300bhp? please help me out, the only thing i can do is nitride and 3 deg cut the valves here or just fit another toyota valves set (expensive option) PLeaseeeee help me out :give_rose: :give_rose: