When you think of Eagle, you of strength and performance. All Eagle cranks are forged from 4340 steel in a non-twist forging. They are treated with a multi-stage heat treatment process, shot-peened, and nitrided for superior strength and wear resistance. Each journal is polished to a 3 R.A. or better on Eagle state-of-the-art QPAC micropolisher. These are the perfect choice for engines up to 1500 hp.