Exhaust Ideas?

I have flowmasters with an X pipe on my 73 Duster. It is a 2 1/2 system.
Full tailpipes to rear bumper. I can cruise for hours. Don't have that much
noise in the car. The X pipe did change the sound out the back, but for
the better. I have no problems with Flowmaster Deltaflows. I would say,
use them. Good luck. Brian Kaplan aka Green Duster