Entirely redesigned, high-performance, low-profile Alpha human anatomy with super-smooth airflow and all-new downforce areas. The Alpha human anatomy provides increased steering & protection during addition enhancing control in jumps. The real key part of the body has a brand new high-downforce area. The edges from human anatomy have actually really top downforce areas to create more mid-body downforce, as well as the right sidewalls enhance safety. The utmost effective some your body ended up being undoubtedly redesigned with a smooth motion channel. Various XB4 numbers are available in different thicknesses for fine tuning the performance related to automobile.