The seat stiffener for karting is an essential accessory designed to improve the safety, comfort and performance of pilots. It is compatible with all Karting chassis marks and is designed to keep the seat in a secure way. In the event of an accident, the seat stiffener helps to avoid injury by keeping the seat firmly in place, thanks to a suitable bolting. In addition, it allows to add or remove the grip, thus influencing the flexibility of the chassis. Often, it is recommended to put 1 or 2 on each side of the seat to optimize performance. It is an essential element for the proper operation of the chassis, modifying its behavior according to the addition or the removal of stiffeners. The seat stiffener allows you to stiffen your frame and thus create a connection between the tub and your back shaft. Several lengths are available depending on the position of your seat. Several sizes are available because each chassis and seat size are different. CAUTION: The measured length is the center distance of the 2 holes.