Skunk2 Racing Skunk2 Alpha Series BRZ / FRS Connecting Rods - 306-12-1010 $431.54 $410.99 Alpha Series Rods are forged from select 4340 chromoly steel and feature an H-beam design, resulting in the ultimate strength-to-weight ratio. 4340 chromoly is one of the strongest materials available, however, not all 4340 chromoly is the same. As such,... Add to Cart