Replacing Tip on Stock Exhaust

[DrawDown]

I'm looking at replacing the tip on my stock filter back exhaust with a 6"tip. The truck is deleted so no worries about the heat. Not concerned about the warranty either but not really looking at doing a full exhaust. Truck is a 2013. I can't get a straight answer if the stock filter back is a 3.5" or 4". If it is a 3.5", could I make a 4" bolt on work? Hard to find a 3.5" inlet, 6" outlet. I was gonna put a couple of tack welds anyways to hold it. Let me know your opinion and what y'all have done. Thanks in advance

James

 

[drunk on diesel]

stock exhaust is 3.5" it flares to 4" right at the beginning of the factory dual tip. You'll most likely want a 3.5-6" unless you're only wanting one as long as the factory tip (which is pretty short)

 

[WoodBoy]

I thought the 6.7 went to a 4" exhaust like the cummings and duramax?

 

[drunk on diesel]

negative, still 3.5"