Certainly a race cam, but the thing that strikes me is the ramps. The valve gear is sure gonna take a hammering from that profile. Quicker opening means greater acceleration of the valve gear (and possible valve float when the follower no longer stays on the cam when closing). There's a limit to this (with rule-of-thumb tables avail) before broken pushrods and rockers become a problem. In fact it's a double whammy, because not only are the forces greater due to the profile, but as the cam is designed for racing, higher revs will be the order of the day, increasing valve gear stress yet further. Which is why OHC is often used, as much higher acceleration figures can be tolerated due to lack of mass to be moved.
