[Fetzer]

I've been reading up on here and seen alot of you guys have done the magnaflow 12256 muffler swap. That muffler is 1 in and 1 out, so I'm assuming your putting in a " Y " pipe before the muffler? I just looked under my truck and the muffler on my 07 is 2 in and 1 out. ????

 

[DawgBone]

I've been reading up on here and seen alot of you guys have done the magnaflow 12256 muffler swap. That muffler is 1 in and 1 out, so I'm assuming your putting in a " Y " pipe before the muffler? I just looked under my truck and the muffler on my 07 is 2 in and 1 out. ????

I wouldn't add a Y if I were you. Go with a 2 in 1 out Magnaflow if you're just doing a muffler swap. Shailey over on the other forum showed good gains with this setup if I recall...

 

[dbolemiss]

Thats what i run on my 07.Magnaflow 18" two in one out with a AEM brute force CAI.Turn the muffler around so you have two in and one out you have to change the pipe a little so that it lines up.You get good back preasure with that set up,for the low end.Dont do any Y pipe.That guy Shailey that dawgbone is talking about will tell you it isn't worth it with an 07.He knows what he is talking about,also cheaper.