Magnaflow muffler - which one?

[AmericanZ71]

I need some ideas. I am getting my muffler soon with turn downs. Which muffler style should I go with?
14"? Smaller? Larger?
Single out or dual out?

I of course want the least back pressure and smooth air flow for maximum performance and mpg. And keep in mind i dont want it to be so loud that every cop is on my ass lol.

Oh and I am going with magnaflow cuz I am getting a sick deal on magnaflow from my bud

Thanks :)

[PHATSPEED7X]

What kind of truck? Engine size? Does your truck have one inlet of the exhaust or two?

[AmericanZ71]

1997 5.7 350. single inlet

[ksukats57]

14 or 18 both will be quieter than a flo. I like flow-40s

[Bugs]

i just put 18" on my 4.8l silverado.


toooo quiet.

im strongly considering changing it in a month or two.

[ibanender]

i just put 18" on my 4.8l silverado.


toooo quiet.

im strongly considering changing it in a month or two.

Too quiet as in you want something loud, or too quiet as in almost like the factory?

[Bugs]

Too quiet as in you want something loud, or too quiet as in almost like the factory?

approaches stock while at idle :( once im on it it sounds ok, but too quiet at any rpm under WOT

[ibanender]

approaches stock while at idle :( once im on it it sounds ok, but too quiet at any rpm under WOT

What model do you have? That's exactly what I'm looking for!

[TigerEyz3]

I've got the 5x11x22 case muffler in my catback (http://www.magnaflow.com/02product/shopexd.asp?zone=TRK&id=6729). Nice tone at idle... speaks well under throttle... can conduct a conversation at cruise. No drone.