The Tillett W1 car seat is extremely narrow yet it can still accommodate the majority of drivers. The shape is the same as the B6 but without the headrest making it suitable for an application where there is already a headrest support.Narrow design suitable for small cockpits with limited spaceLightweight GRP or Ultra light and super strong Carbon/GRP construction (from just 1.88kg)Back frame option includes 4 x M8 mounting bosses for bolting to a chassis The W4 seats are available in GRP material or stronger and lighter carbon/Kevlar. There is also an option of a high strength back frame which features M8 bosses bonded into the base which makes it possible to mount the seat directly to the floor or the Tillett TR1 seat adjustment runners. The seat is available in 2 widths, 40 or 44cm. This relates to the widest point of the seat, both options have identical internal dimensions but the 40cm option has the external rolled edge removed to allow fitment into smaller cockpits.