B4 & B44 "Rear HARD arms were designed for improved suspension stiffness that helps with handling and consistency on high-traction surfaces. This allows for better isolation of the suspension and more precise shock tuning. Fit all B4 and B44 models including B4.1, B4.2, B44.1, and B44.2.
Used by the team drivers at the 2013 ROAR Nationals, Hot Rod Shootout, and Surf City Classic."
