Regardless to popular belief, the Miata is actually not perfect. The Miata's engine was originally designed for a front wheel drive chassis so to make this engine work in a rear wheel drive chassis Mazda had to move things around and one of the things they moved around was how the coolant runs through the engine. To package the motor they moved the coolant exit from the rear of the engine to the front. This is great for packaging but not great for coolant flow, to fix the issue we moved the exit back to its rightful place and restored the correct flow of coolant through your engine.
We personally use Cobalt's Coolant Reroute Kit on our cars.
Fits 94-97 Only
Note: If you choose to run this kit without the EGR tube your car will throw a code and check engine light will come on.
You also get with the kit our custom-machined thermostat spacer. We designed the spacer to retain the factory coolant temperature sensor positions, which means no cutting or extending those wires. The custom one-piece coolant hose that we include cuts down on failure points and is made of silicone so will last longer than rubber. Finally, we include all of the needed hardware and gaskets as well as complete instructions to make the install as easy as possible.