what would be a better performance option for a 5.3 with a tune and LT headers. a true dual 2.25" with x pipe system or a single 3 inch exhaust?

 

I have same stuff you have, plus a lot more done, and im satisfied with my lts/ory with 3" exhaust

 

The cross-sectional area of each is roughly the same. I'm not into the fluid dynamics of exhaust gases, so I'm sure comparing only that value isn't exactly an apples to oranges comparison.

The performance is going to be pretty much equal. I like the sound of duals, so on my 4.8 I did 2.25" duals with an x-pipe, but it would have been cheaper to just do a single 3". It all comes down to personal preference I say.

 

i have a single 3". im satisfied. if you want it louder or want less restricion later down the road just weld in a cutout

 

i ended up doin 2.5 true duals on my truck with a x-pipe it sounds pretty good imo it sounds better then when i had the ORY into 3 inch single