Thread revival but wanted to document in case others searched for cages like I did.
You need to understand what you want to do with your car. Time attack and drag racing have specific rules. For NHRA/IHRA all roll bars and cages must be welded together, not bolted (except the door bars I believe down to a specific time, don't remember). I'm sure time attack is the same. There is no roll bar or cage design for E9x available off the shelf to meet NHRA/IHRA. Will have to be custom $$$.
Cage is not the same as roll bar.
You need to understand what you want to do with your car. Time attack and drag racing have specific rules. For NHRA/IHRA all roll bars and cages must be welded together, not bolted (except the door bars I believe down to a specific time, don't remember). I'm sure time attack is the same. There is no roll bar or cage design for E9x available off the shelf to meet NHRA/IHRA. Will have to be custom $$$.
Cage is not the same as roll bar.