I had my resonator removed and when the Car first starts up on a cold morning(I live in Panama City florida , a cold morning is 65 degrees) The rasp is horrible Im looking for a way to get rid of it.. alot or people say it goes away when the engine warms up.. but i have driven from here to daytona, about 6 hours, pulled into my hotel gave it a little gas and the rasp was still there.. So i don't fall for the it goes away theory..not on my car at least