As with most of our other A-body exhaust systems , one can order 2-1/2" intermediate pipes without the flange pipes so that headers can be hooked up.
The inlet of the mufflers can be ordered in 2-1/2" I.D. to accept the larger
intermediate pipes. What is not published yet is that an A-body T/A exhaust system is also available for big block applications that will bolt directly to the stock hp exhaust manifolds. In addition, T/A exhaust systems are available to hook directly to Schumacher big and small block tri-y headers. I think we have
most of it covered. If there is anything we may be missing please let us know.