Good-Win Racing Mazda Performance Parts

M-Tuned Coolant Re-Route
Prepay For Next Delivery


Maximum cooling for your track Miata!

Miata 1990-2005 · Radiators-Cooling · Radiator

Part Number: 61-1736a

Application: 1994-2005

Price: $335.00

Prepay For Next Delivery


M-Tuned Coolant Re-Route
rating (0 Ratings)
rating (0 Ratings)

Thank you. You have rated this product.

If you are serious about taking your Miata to the track, performing a coolant re-route is a critical modification. From the factory, Mazda moved the thermostat from it's original location (back of the head) to the front of the engine for ease of service. As a result the rear most cylinder (#4) becomes starved for coolant and over time wears the rings out prematurely. Thankfully, the folks at M-Tuned created their comprehensive coolant re-route kit to solve this problem and returned coolant flow to it's intended path.

What's included:

*High Quality Silicone Radiator Hose
*Optional Stainless Steel Coil Reinforcement
*CNC Aluminum Remote Thermostat Housing
*CNC Aluminum Re-route Adapter - Pre drilled and tapped for OEM coolant sensors, heater core adapter and optional aftermarket gauges.
*Front Water Neck Block Off Plate
*195* Thermostat
*Includes all necessary hardware, gaskets and hose clamps for installation

Fitment Notes:

Unlike other re-route kits, the M-Tuned Coolant Re-Route is compatible with EGR and offers a remote thermostat for easy servicing. 1.6 engines can adapt this kit but lose the ability to have their fans triggered by the sensor in the water neck, thus requiring either manual fan switches or using an aftermarket ECU which can control the fans.

During 2001 Mazda made minor modifications to the head gasket to improve coolant flow but did not solve the problem entirely. Customers with the 2001-2005 engine can still benefit from using the coolant re-route, however, for best results we recommend combining this kit with the head gasket from the 94-00 engine.

Sean's Notes: I've been running a coolant re-route on my car for the past 4 years with great success. If you plan for big power, then there is no other trick in the book to keep your Miata cool at the track.

Ryan's Note: If you track your car and don't have one of these, you've been living under a rock.

*** Product images may differ from actual product appearance ***


Good morning Brian, I finally got a chance to put the exhaust on, great advice, it's just loud enough, solid product. I'm running without the baffles, sounds great in power band. Take care, you have all my future upgrade business.........regards.

-- John S.

After reading many other positive reviews on both the GWR and Miata forums I finally decided to buy this product. My main concern for many months was whether or not I was up to the task of installing the header. But with the excellent instructions on Brian's forum as well as several Miata forum threads it turned out easier than I expected. After receiving notice that the header would arrive on a Friday afternoon, I began the disassembly process. After about 3 hours I had the stock manifold out. Later that afternoon the new catted header arrived right on schedule. And it is a thing of beauty. I opted for the stainless version. Installation on Saturday morning took another 3 hours, although I could have shaved some time off of that but I was actually enjoying the process of double checking torque values and cleaning up my engine compartment. I already have the GWR catted midpipe, so that connection was a snap. I put everything back together, reconnected my battery, and went for a drive. NO CODES! Nice throaty sound with my RSII muffler, and a significant boost in power and low/mid torque. Another happy camper here. I since have added a M-E tune and I feel I have realized all of the gains that Brian has achieved on his 2012 project Miata. I've put several hundred miles on my Miata since the install with zero problems. This is the car that Mazda should have built all along. Thanks Brian.

-- Ron P.