When mine went big power, box & solid mounted diff it was too noisy for me even with full trim etc. I doubled the sound deadening & put pads on all panels to get it back to normal. If I wanted to subject myself to that sort of noise I would put my head in a bucket & get someone to bash it with a hammer, I simply dont understand why people wish to drive in all that din.
You dont need all that noise to have a fast car.