small Exhaust pipe crossover fix

I tried searching for this and came up with no luck. let me know your thoughts on this and if you think it is worth it or not.

the crossover exhaust tubing on my 2011 2wd prerunner, shrinks down at one point and is really small tubing, I've also heard its double walled so that means its even smaller than it looks.

So would there be any gain at all if I had an exhaust shop add a Y in and cut out the small sections (passenger/driver side after cats) and add the normal size exhaust tubing, I thinks it 2.25 if i'm not mistaking.

Thanks in advance!