Totally redesigned, high-performance, low-profile Alpha human anatomy with super-smooth airflow and all-new downforce areas. The Alpha body provides increased steering & stability while in addition enhancing control in jumps. The leading part of the body has a brand new high-downforce area. The sides from the human anatomy have really top downforce areas to create more mid-body downforce, as well as the straight sidewalls improve safety. The top of an element of the body was indeed redesigned with a smooth flow channel. Different XB4 numbers can be found in various thicknesses for fine tuning the performance related to car.