BigSlick440

I know this is the wrong place to post this i'am sorry. but i trust the guys here.

I have a 2008 silverado with 5.3 Active fuel management, i wanna to change the muffler to a super 44 flowmaster but everyone is saying when it deactivates 4 cylinders it sounds like crap? is this true. someone let me know. and if you can reccomend me a muffler that will sound good i would really appreciate it thanks.

Black99T\A

iTrader: (17)

I dont know for sure but im thinking any muffler you put on thats only going to have 4cyl. running through it isnt going to sound the greatest IMO Ever think about doing something with an electric cut out or something so it would only be loud when its on all 8cyl and then you could close it when on 4, just my .02 cent im sure you could fab something up that would work.

fast01z28

iTrader: (6)

from what i head flowmaster isnt very beneficial with the LS motors. i would suggest magnaflow or corsa, but ill agree that with only 4 cylinders any exhaust will sound bad.

EnfuegoZ28

I don't thimk that engine stays in 4 cylinder mode long enough to worry about the sound. The only time it goes into 4 cylinder mode is when it has no load on it like when it is coasting or going down hill. Try it and see what happens.

waldershrek

iTrader: (1)

If it's anything my Hemi Dodge truck with MDS (same thing as AFM) yes it will. Pretty much anything but stock will sound like ****.

Semper91-RS

Actually, no, it won't sound bad. I have a 2007 Monte Carlo SS, 5.3 LS4 etc. Same thing. I wondered the same. Threw some Kooks Aero Chambers on there, killed the Resonator, and it sounds fine. When it drops in to 4 cylinder mode, there's no crackle, nothing, it just drops to a low burble, sounds kind of like a motorcycle. (A good motorcycle, not some ricer trash)

Xsta Z 28

iTrader: (2)

I'd never install a Blow Master anything on my cars . . . way better systems out there for the money . . .

MonsterZ28

i have no muff on my 07 vmax and it sounds like **** in 4 cyl mode, almost like a bad jake brake when going down a long hill on the interstate

Trading it for a diesel in the next month though so f*ck it