Bullet style muffler recommendation (Quiet Please)...yup, getting older lol

i have had a bunch of different muffs on my cars over the years.
These Kooks units are the best looking and sounding ones i have ever heard.
Get lots of compliments on how the car sounds. I have these muffs on it all the time when i race it or on the street.
I actually called kooks, and the rep told me I would be lucky to get a few years out of them before they burned up the packing inside. Be it true or not, kinda turned me off. I admit they do look the best though. Had the guy lied to me and told me they used some special packing thay never burned up, I would have ordered them then and there lol