AKA, God loves
I've had several exhaust valves as well as other parts fail while racing, NOT GOOD
I'm sure your going to replace all of them including the intakes, correct
I owned and flew a small 4 seater airplane for 15 yrs, I had one exhaust valve spit out a inverted V shape out of it just as I level off at 9500 ft. above western AZ where there no airports nearby to land at, I reversed course back to Prescott, AZ where we had spent that weekend. That was the longest 85 miles I flew in that airplane in those 15 Yrs.