Used on MSM and works perfectly.
Currently configured to eliminate the throttle body/front coolant lines and return the stock oil cooler coolant to the main return line.







I consider this to be a step above what is made by m-tuned.

New value $300.

Selling for $250 shipped to continental US.

Let me know if you have any questions.

 

PM sent.

 

Slightly more info on reroute...this includes everything you need to run coolant from back of head to the radiator and tie in the oil cooler line with it.
Only thing you need is a block off plate on the front, I bought a cheap frost plug and thew a homemade thin plate over top.

This is a picture from 949racing that I modified for my setup....


This reroute works on my MSM (with Pre-99 Headgasket) and also on my previous 1997. I would recommend it for ANY miata with a headgasket from 99 or earlier.