nytrdr24
+1y
could be....i think that the best they are good for is under 5 grand...i know i tack'd mine up several times to & above fact. red line...& it was ticking....best bet is if you want a higher redline to swap to manual lifters, but to do that in a hyd head you'll have to change a lot in the valve train & do some mods to the oil passages....anything over 6k & your taking a chance on some real damage to the head & bottom end.