Building a new Manifold-help and advise

[Grant Monkhouse]

Can\'t say I\'ve done that, but probably a waste of time. There is so much exhaust energy on a well built 20b that it really doesn\'t matter. All you need to do is keep the bends gentle, and don\'t use a collector that has bad entrance angles.

The divided manifold was something I came across on ausrotary,  the discussion was about how to keep a twinscroll manifold on a 3rotor.

Would you say a T4 or T6 would be better for a street ported 3rotor?