quick cut-out question

my question would be, is it going to be just as loud being on the one side? because normally the cutout would be in the place of my bullet where both header flow together & dump out before the muffler, but this is just going to be the one side and i guess the driver side will still have alittle flow to the reg bullet.. and I know I can't put it on the driver side because that pipe is like a pancake!
if that makes any sense please chime in

ps, i found that picture of the stock ypipe from an SS. When i looked at mine, it looked like a more straighter pipe before it bends up to the passenger side header. The cutout is 10 inches and i measured the spot and it seemed to be close but it would work... (if anything have the exhaust place shave a little off the cutout)
pss. one more thing, sorry... I ordered a 3inch cutout. I'm not sure of the stock piping but I know i ordered my 3inch bullet muffler and the guy made it work with stock piping, so if i need a different size, i need to know asap because i placed my order in last night.
With stock exhaust manifolds you will need egr block off plates and an adjutable freeze plug to put into the intake manifold.

