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Flowmaster 40 series inlet/outlet size ?

2K views 1 reply 2 participants last post by  Howzitbra 
#1 ·
So im thinking of getting a 40 series flowmaster muffler to replace my stock one on my 4.8L
At this point i still dont know which inlet/outlet to get?

I would also like to know if i would need to put an extra hanger?

I've read on this section without a sure responce,so i would like a confirmed one :)

thanks peeps
 
#2 ·
Not sure about your truck but my pipes on my 07 Sierra Classic measure 2 7/8" so I'm going with 3" in and 3" out. I'm gonna put on a 50 series. Been doing a lot of researching and I've finally decided on the FM. I didn't really want something that everybody else has but the FM has the sound I'm looking for.
 
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