HEY, NICE FLEET AND GOOD LUCK WITH YOUR 5.0 ,YEA THE CARS ARE SO INSULATED HARD TO HEAR ANYTHING ,I GUESS THATS A GOOD THING I TRIED HUSHPOWER NG SWITCHED TO GOOD OLD AMERICAN THUNDER SOODS GOOD ,BUT STILL QUIET INSIDE SOOO I BOUGHT THE BOSS H-PIPE AND SIDE EXITS RIGHT FROM FORD (I WAS THE PARTS...