Has anyone here used a Moroso spiral flow resonator as a replacement for the stock muffler resonator or aftermarket exhaust?

If so, what were the results? How did it change the stock exhaust note?

For aftermarket exhaust, did the spiral flow resonator help? Did it quiet down any rasp? Did it help with any drone effects?

I've heard other car guys talk about them saying good things & wanted to know if anyone here has some experience with them & would recommend them

 

Straight through or die.

Even with my custom exhaust (no resonators, just out to dual HKS hi powers') I only have rasp at full throttle.

Just excuse for me not to act like a douchebag.

Every race car has rasp, it is an unavoidable issue when dealing with high powered engines.