AST Rollcages V1 Weld In 8 Point Roll Cage for Audi A4 B5 Sedan (Quattro) Nikoletta Nubiles 7 BabeSource.com. AST Roll Cages SpecificationsAttention : AST roll cages designed and built according to FIA Appendix J may not be approved depending on the year of preparation of your car. Indeed the safety requirements are often revised in Appendix J by the FIA. Check with your Federation Sporting Organisation for the minimum safety requirements specific to your vehicle version engine and type of event and or championship to be contested. AST roll cages have 4 to 10 anchor points to be bolted or welded to the chassis depending on the variants and vehicles. They are made up of E355 steel main tubes with a diameter of 45 mm and secondary tubes with a diameter of 40 mm. The reinforcement plates for the fixing points of the structure are made of 3 mm thick steel and specially adapted to the vehicle for maximum safety and hassle free installation. Each cage is delivered unpainted. AST guarantees perfect adaptation and simple assembly in the vehicle thanks to their 3D laser scanner technology which allows ultra precise dimensional measurements. AST roll cages are generally available in several versions featuring evolutions according to your needs : X or V design cross or diagonal protections for doors and roof "Nascar" style side reinforcements additional bars compatibility with a sunroof location of rear anchoring points number of doors and so on. Modification or removal of interior components such as dashboard door panels trim rear seats are generally required. Each AST roll cage is supplied with all the necessary hardware and accessories : reinforcement plates bolts documentation installation instructions and stickers.