well thats what they say BUT the fork end of the rods move more then i like if your thinking 1500hp then thats not the rod i would or have used . the L19 bolts are to long and hang out of the rod s so you have to watch that on big crank bbc 4.500 + engines as the bolt ends can hit the cam . i know about them rods i just fixed a set with L19 that came form eagle with to long of cap screw bolt in them there stuff is not to hot