goober, they have different sounding glasspacks. mine sound awesome without all the crackle that some make. just nice clean throaty sound
ok well you need long tubes and hi-flo cats. then put on whatever muffler you want. Ive got dual Borla XR-1 race mufflers, its not super loud so long road trips isnt bad at all but when i step on it she roars!!!!! (if i want it really loud thats what the e-cutouts are for ) you could delete the rear cat and put in a highflow, that would make it louder and its cheaper.
heres some of mine, in stages: 1. magnaflow 14in 2.5 in and out round body. smooth drivebys in my driveway! - YouTube exterior of 14" magnaflow - YouTube 2. current setup: electric cutouts on 01 f150 5.4L V8 - YouTube