I heard a 91 mustang and loved it. I caught him and he was running Mac headers,off road H,Mac mufflers and it sounded really throaty and smooth. It's the kind of exhaust that when you hear it you have to look but it's not like a Harley passing you by. My ? is. i am running in my 93 vert, stock headers, Mac high flow cat H-pipe and Flowmaster 2 chambers. If I change the mufflers only, would I get close to that sound, and would headers be even better. I know he has off road and headers that will breathe better. Do the Mac's just sound different? I have always ran Flows. Thanks for any info. Which kind of Mac mufflers also?