ughh, I hate crower. Just recently my exhaust cam broke into 4 peices and demolished my head. Its at the machine shop right now because I am having cylinder head sealing problems after words. Are you sure the cam didnt fail causing the cam caps to split??? You just swapped cams without swapping valvetrain?? And they cant recommend what to use with there cam??? hmm, why didnt you go with a zex cam instead or do they do custom profiling. Is it possible you experianced some coil bind at high rpm?