Remove the divider on the manifold exhaust outlet?

[Onefast99gsx]

I didn't think this was a tech question. More of an opinion thing so i put it in the parking lot.

I'm gonna enlarge the outlet on my 99 GSX exhaust manifold so it matches the PTE 50trim 7cm inlet.

I was on tuners and i see some people remove that tall divider and some keep it. Some say if you remove it, there will be more turbulence. What's your take on this and experience. I see there is cracks on both sides of it but then i've never see one that didn't crack along the divider.

Keep it or dump the divider?

Thanks