A 2000s Tillett T8 karting seat. The T8 is the most popular seat made by Tillett Racing Seats. It was the first kart seat ever made using RTM (resin transfer moulding). This system makes a strong fibre glass moulding with a uniform quality and thickness, the process also speeds up production, keeping the price low. In addition to these benefits, the two smooth sides of the T8 keep a clean, professional image throughout the life of the seat.