Febi Cylinder Head Bolt Set. Why Choose Febi?. Why Choose Febi Bilstein?. Bolt Head-/Nut Design Male Torx. BMW: 11 12 2 243 255 BMW: 11 12 9 067 790 OPEL: 06 07 967 OPEL: 6 07 967 GENERAL MOTORS: 090511384 GENERAL MOTORS: 90511384 LAND ROVER: STC 2023.