Can anyone help me on this one please.... Altezza rs200 manual, factory headers into 2 1/2" pipe, to resinator just in front of rear suspension then jasma straight through muffler with 4 1/2" tip. revs very smooth to 7.8 grand with a very large backfire between gears.. Not too much of a problem yet, But, Wife... I need to take a little bit of noise out of it , looking for just a rear muffler replacement. Any suggestions, Other than trade in the ole girl. Cheers.