I HAVE A 04' WITH 6000 MILES ON IT AND I WAS WONDERING IF I COULD GO WITH STRAIGHT 4'' FROM THE CAT BACK. WOULD I HAVE ENOUGH BACK PRESURE AND WHAT WILL IT SOUND LIKE . I HAD A 99' AND RAN STRAIGHT PIPE ON IT AND I LOVED IT . SOUNDED GREAT TO. IN THE NEAR FUTURE I AM GOING TO GET A BOX AND COLD AIR INDUCTION . OH YA AND MY MOST IMPORTANT ITEM, GAUGES.