Ok I could use some help on deciding what way too go here, you can check out my sig too see what I building for my 00 Silverado DD.
I already have the Gibson Stainless catback single 3" in dual 2 1/2 out the back, I'm keeping the tails so here are my options when I order my ARH headers w/catts next week.

Option A Order the ARH for the 1500 4X4 with the 3" pipe W/flange and just bolt it together.

Option B Order the ARH except they will make it 3 1/2 down pipe, so I have too cut the 3" off and flange the 3 1/2 pipe too the 3" muffler.

Option C Order the ARH for a 6.0 SS truck w/dual down pipes, and order the Gibson 766300S muffler Dual 3" in & Dual 2 1/2 out and reconnect my tails.

Any one have any thoughts I won't be racing it just a DD Thanks

 

Just get option A. It will be the simplest install, and will work well for your DD.

 

+1, I agree with Roger, it will by a direct, simple bolt on installation without any extra worries, and if you ever have to drop the trans or whatever, everything will unbolt like the factory equipment. Least expensive route of the 3 options listed also

 

Well I'm starting too lean that way Thanks for the help guys

 

I wanna see some pics of this when it's all done Mister.

 

Of a 400K Silverado or the swap sorry I had too go there LOL I will post some pics next week thanks

 

Cool deal Brian, looking forward to the pics