Hey guys i had a nismo exhaust + test pipe on my coupe and it sounded nice when above 3k rpm but below that i couldnt stand the rasp it was giving me so i took the test pipe out and put the stock cat back on.

I miss the loud sound that it was giving me and was mabe thinking of putting a hfc on my car.

Would a hfc with the nismo exhaust still give me rasp?

I was looking for a hfc that gives no rasp

Which brand gives out no rasp with the nismo exhaust

I have heard that the Y pipe needs to be change in order for my rasp to go away also.. which brand y pipe and which brand hfc will go good with the nismo cat back exhaust and not give any rasp

Help me out gang.. i have searched but didnt come out with a solution