392ci240z

JSM and Johnc is correct, most pre-fab cages that are not car specific will not pass class rules. Before wasting your money and time you need to pick a class that is reasonable for your car to run in while staying in your budget, even if you are not going to the track. Weather its SCCA or NHRA each sanctum has several classes and each class has its own rules. Before even asking any real fabricater to put a cage in your car pick a class. Otherwise he will probably think lesser of you or even potentially take advantage of you. Example, do a half ass install which could not pass safety Ck on race day. Also in getting a cage install that is designed for your car to safety regulations it will be safer for you and you can get more return out of your car if you decide to sell. Ebay cages are riskie because you don't know the grade of metal used and costly to pay to make them fit. The most popular steel in racing is chromoly tubing because its light and strong. I would definitely recommend this if you are a serious enthusiast. But for the weekend worried a mild steel that is a little bit thicker is much more cost friendly and will do the same job. As per conversion bolt togeather cages are also sketchey in my opinion. But in the end its all about what you want and what your willing to pay for.