22/05/2017
Another 4 in 1 set up I did was on a VZ with a standard engine (single valve springs only) and a plain bearing T4 Borg Warner S400SX3 with 75mm compressor wheel.
It made a solid 454rwkw showing these manifolds work very well.
I'm currently making up a new cost effective 4 in 1 manifold set up which will integrate with the factory drivers side cast iron manifold.
Stay tuned!