Mishimoto

Thermostatic Oil Cooler Kit

$488.59

SKU: MMOC-NB-99TBK

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Mishimoto 99-05 Mazda Miata Thermostatic Oil Cooler Kit is engineered to combat the excessive oil temperatures that can arise during track days and aggressive driving. High oil temperatures can lead to severe engine damage, turning a fun track session into an expensive repair. The stock liquid-to-liquid oil cooler found in NB Miatas is adequate for daily driving but falls short under strenuous conditions. During testing, this oil cooler kit demonstrated the ability to reduce oil temperatures by 10°F (5.6°C) during a 65 mph highway cruise. Its mounting bracket design doubles as ducting to efficiently channel air to the cooler. This setup also strategically positions the cooler away from the front bumper, accommodating the installation of intercoolers or other forced induction modifications. For turbocharged Miatas, where turbos further increase oil heat, this cooler is an essential addition. Featuring a billet aluminum thermostatic oil sandwich plate, the kit ensures that oil reaches its optimal operating temperature before being directed to the cooler. This thermostatic control is crucial, as overcooled oil can be just as detrimental as overheated oil, especially in colder climates. The kit includes pre-made stainless steel braided lines with durable -10AN fittings and is backed by the Mishimoto Lifetime Warranty, ensuring reliability for your roadster.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandMishimoto
Part NumberMMOC-NB-99TBK
CategoryHeating and Cooling

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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