HPS Black Ancillary Hose Kit (Bypass Coolant Hose) For 99-20 Mazda Miata 1.8L (NB1)

This page lists the HPS Black Ancillary Hose Kit (Bypass Coolant Hose) For 99-20 Mazda Miata 1.8L (NB1), including what it fits and what we check before dispatch.

Hoses and fittings work under pressure and heat, where material choice decides service life. Keep petroleum away from standard silicone unless the hose is lined for it.

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Specifications

• Engine: 1.8L
• Finish: Black
• Category: Hose Kits
• Price: $109.92 with free shipping over $99
• Availability: in stock, dispatched from the USA

Manufacturer specifications

Your vehicle’s coolant hoses play a crucial role in the cooling system. Over time, these rubber hoses are exposed to high temperatures, engine heat, and chemicals contribute to the aging process and lead them to develop cracks, leaks, or become soft and mushy. The HPS Silicone Ancillary Bypass Coolant Hose Kit is designed to deliver ultimate durability and resistance to wear and tear for your thermostat bypass, throttle body, air control valve, and oil cooler hoses. These multi-ply reinforced hoses can withstand high temperatures of up to 350F and are less prone to cracking, swelling, or becoming brittle compared to traditional rubber hoses.

In high-performance or racing applications, silicone hoses are often preferred as they are less likely to collapse under suction or burst under pressure, providing better reliability in situations where engine performance is crucial. Engineered using OEM data, these hoses are made to directly fit into your vehicle without the need for any modifications. This kit comes complete with 100% stainless steel hose clamps designed to be safe on silicone hoses and provide a leak-free seal.

• Material: 3-Ply Reinforced Silicone
• Color: Black
• Upgraded replacement for ruptured or failing rubber OEM ancillary bypass coolant hoses.
• Engineered to withstand harsh high temperature and high pressure operating conditions. Max. temperature rating: 350F (177C).
• Includes HPS 100% stainless steel industrial grade embossed hose clamps which will not damage or cut through silicone hoses.
• Made with multi-ply polyester reinforced silicone and designed for exact vehicle fitment.
• Replaces OEM Part Numbers: BP4W-13-681B, BP4W-13-682, BP4W-15-536A, B61P-15-261A.

Application:

For 1999-2000 Mazda Miata 1.8L (NB1)

Remark:

Installation: Silicone hose water permeation rate is 10 to 15 times greater than standard EPDM rubber hose. Checking water level regularly is highly recommended when silicone coolant hoses are used in a daily driving vehicle.

Product Content:

• 1 Set x Bypass Coolant Hose Kit
  Hardware if Any is Shown in the Picture Above

The product does not come with manual/instruction, Professional Install Recommended

Cross Reference Number:

• 57-2157-BLK, 572157BLK, BP4W-13-681B, BP4W-13-682, BP4W-15-536A, B61P-15-261A

Message us the vehicle details and we will confirm compatibility, including anything unusual about your build.

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Stock levels shown here are live, so what you order is what is on the shelf ready to travel.

If you want independent guidance before ordering, the NHTSA vehicle safety hub is a useful reference.

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