Tillett STBT Aluminium Side Mount Seat Bracket Set - Suits Tillett B6/B7/B8/B9/B10/C1 SeatsCAR SEAT BRACKET SET, MADE FOR TILLETT SEATS B6*, B7, B8, B9, B10 & C1. The STBT bracket system is designed to raise the driver by a additional 60mm compared to the STBI or STBO. The STBT bracket is needed for regular saloon cars, which require slightly taller brackets in order to sit at the correct position.. They are made from 5mm thick black powder coated aluminium and allow the seat to be tipped, raised and lowered using the various hole and slot