Step 7: With straight neck. No longer recommended unless NOT
using rad under engine.

Step 8: Best to weld on 160 degree bend for use with rad
under engine. Use .125 wall 1-1/2 inch tubing minimum for strength.
Here is a 3D.

Step 9: None of this will be necessary with the RX8 engine as the pump
is low profile, built into the front cover  and there is no bypass passage.

Also I might add, unlike the 2nd and third gen pumps, there is no water 
passage restriction on the outlet side of the block on the RX8 engine. 
Just a nice big hole.

Paul Lamar
 
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