I had a Dynomax Ultraflow Weld installed on my newly purchased 2005 XSP 2wd. The sound is much deeper than stock, but it’s only a little louder than stock. I’m trying to decide if I should let it break in, it’s only been on for about 5 days or remove the resonator. Will removing it make that much difference? When I had my 2000 I had a Flowmaster 40 series installed and I never removed the resonator, but it rumbled at idle and roared on acceleration.