Mufflers Without a Drone

I have 2-1/2 Borlas and like them. I tried a a couple of Flow Masters 40s and Delta. They suck! Tried Thrush.... not pleased. A friend loaned me several sets of mufflers he had used so experimenting didn't cost me a fortune. He finally let me try the Borlas he was going to use on his street Mustang and I love them so I left 'em on and bought him new replacements for his build.