Manifold “Y” piece and Centre pipe orientation

[bloodknock]

Hello people,
I want to get this correct…
The manifold Y piece has a horizontal bias, should the outlet bias upwards or downwards?
The centre pipe has a 15degree bend at one end, should this be at the front of the car or rear, and viewing from the top down should it go to the left or right?

Thanks Bob

[gjz30075]

The 15 degree bend goes at the front of the car and pointed to the left.

[bloodknock]

The Y piece has a slight bias
Should the outlet be biased up or down?

[smo17003]

?

viewtopic.php?f=39&t=40351

[bloodknock]

This is my Y piece , see the bias, should the front be up or down?