Mishimoto MX-5 NA/NB Silicone Radiator Hose Kit

If you are still running the factory rubber radiator hoses on your Miata, you are driving on borrowed time. After decades of heat cycles, the original rubber hoses become brittle, stiff, and highly prone to expanding or splitting under pressure – especially when pushed hard on a track day or canyon run.

The Mishimoto Silicone Radiator Hose Kit replaces your vital upper and lower cooling loop hoses with a motorsport-grade upgrade that will easily outlast the car.

Engineered specifically as a direct-fit replacement for the NA/NB engine bay, these hoses are crafted from a combination of high-grade silicone and embedded heat-resistant fibers. This multi-layer design provides exceptional structural integrity, allowing the hoses to comfortably handle temperatures up to 165°C (330°F) and significantly higher cooling system pressures without expanding.

Choose the style that fits your build: go with the stealthy gloss black for a clean, refreshed, “OEM+” look, or pick vibrant red to add a striking pop of color to your engine bay.

Features:

• Kit includes the essential upper and lower radiator hoses
• Dual-layer construction combining premium silicone and heat-resistant fibers
• Available in Black or Red to match your engine bay aesthetic
• Massively increased pressure tolerance compared to factory rubber
• Rated for temperatures up to 165°C (330°F)
• Mishimoto Lifetime Warranty

Installation Advice:

• Clamps: This kit utilizes the main upper and lower radiator hoses. While they install in minutes, we highly recommend pairing them with fresh, high-quality stainless steel worm-gear or T-bolt clamps rather than reusing your tired factory spring clamps to guarantee a leak-free seal.
• Coolant Flush: Because you will need to drain the cooling system to swap the hoses, this is the perfect opportunity to flush your system and fill it with fresh coolant.

Compatible with 1989-2005 cars – NA (Mk1) and NB/NBFL (Mk2, Mk2.5).

Shipping worldwide.