Turbo manifold design

[RICE RACING]

100% you will get better mid range with it plumbed back in.
if you copy any of the good set ups pictured here (lol mine maybe hahah) then its not going to cost you "that much" top end HP honestly.

if you look at the majority of 900bhp 2lt to 2.4lt 4cyl split pulse tuned turbine housing race cars (honestly fuck all difference to these and a 2 rotor in operation), be they Toyota, Ford, LOL Chev ECOTEC! they all have the WG plumbed back in and have minimal losses for power 3" to 3.5" turbine outlet exhausts is more than ample for up to 1100bhp output as shown by many OEM race teams too.

I do have some great pics across all these platforms should get around to scanning some and posting them up.