ford91mustang

i have decided to buy bbk shorty equal length headers and a bbk o/r h-pipe. i just bought flowmasters (40 series 2 chamber)to go with it. i was wondering if this would be loud and if it would sound "cleaner". i also want to know how much horsepower ill get from this. my 5.0 is mostly stock.And i also wanted to know if the o/r h is legal or not

MustangKid5.0

I just got that same setup on my 91 GT and it sounds really great......Yes it is loud but sounds very clean and toned...I could feel the low end power when i put just my h-pipe on before i got headers you feel it.....and you love to listening to it.....I dont know how must HP p/b like 20HP but Im not sure......The O/R h-pipe isnt legall if you have to pass emmisson testing but as long as you have mufflers you should be fine

Red FIVE O

if your state has emmision laws then its ilegal. otherwise no. ... yeah its going to be louder. as far as hp the gains are minimal.