The Mishimoto thermostatic oil cooler kit for 1999–2005 Mazda Miata provides active oil temperature control for spirited driving and track use. The kit includes a billet aluminum thermostatic sandwich plate to regulate flow to the cooler, pre-made stainless braided lines with -10AN fittings, and a mounting bracket that ducts air to the cooler. Testing shows roughly a 10°F drop in oil temperature on highway cruise, and it carries Mishimoto’s lifetime warranty.
Mishimoto 99-05 Mazda Miata Thermostatic Oil Cooler Kit - Silver