We get many inquiries regarding the upper panhard bar brace from customers who need to remove it to gain exhaust clearance for custom dual exhaust set ups, etc.
From the factory the 1982-2002 Camaro and Firebird have a lower panhard bar and an upper panhard bar brace. The lower panhard bar is what locates the rear end laterally, and of course is always required. The upper panhard bar brace reinforces the panhard bar's upper mount from deflection during hard cornering.
If you are just doing straight line drag racing then it is fine to remove the upper panhard bar brace, we have many customers who have done so. If you will still be using the car for street driving and/or plan to do hard cornering then it is not advised to remove the upper panhard bar brace.
We do not make a tubular upper panhard bar brace for the simple reason that when the suspension compresses the lower panhard bar fits inside of the upper panhard bar brace and thus the factory u-shape of the brace must be maintained.