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Seeking feedback regarding new mufflers and their effect on EXHAUST DRONE

I have had Pantera mufflers on my Mangusta / Corvette since 1972. Displacement is 350CI with 2.25" header pipe.  They came off of a car that was being worked on at Ford R & D in Dearborn.  

They were fine for about 35,000 miles and then I started to get the dreaded "drone" between 18 and 2,200 RPM where most of my driving is.  I have a new set of what is available from Hall Pantera.  I am worried about the return of the "drone" when I put them on.

Has anyone had that problem when putting a new set on a car?

DICK RUZZIN / 8MA670

Last edited by George P
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