jph79

Hello,I would like to ask if anyone out there would know what the difference in numbers on forged cranks means. Example some have a number 4340 forged crank, another says its a 4130 forged crank and yet another I've read says 5140 forged crank. Are these grades of steel from good to lesser quality? Which one would be best to worst? It's only going in a street driven corvette.

MelWff

read this article

http://www.carcraft.com/techarticles...o/viewall.html