The HPS Black Ancillary Hose Kit (Bypass Coolant Hose) For 01-05 Mazda Miata 1.8L Non Turbo (NB2) you are looking at ships from our own USA shelves, not a drop ship queue.
Inner diameter must match the fitting exactly, since eyeballing sizes is how leaks begin. Re check clamp torque after the first few heat cycles.
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Drivers choose the hps black ancillary hose kit here for honest specification detail and quick dispatch.
Buyers comparing the hps black ancillary hose kit will find the specification detail on this page rather than in a catalog footnote.
The hps black ancillary hose kit listed here is checked against your vehicle before dispatch.
Every hps black ancillary hose kit order goes through the same fitment review.
Ordering the hps black ancillary hose kit takes a minute and the confirmation reaches you straight away.
What you are buying
- 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, BP6D-15-261.
Application:
For 2001-2005 Mazda Miata 1.8L Non Turbo (NB2)
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:
- 57-2158-BLK, 572158BLK, BP4W-13-681B, BP4W-13-682, BP4W-15-536A, BP6D-15-261
Unsure about the specification? Our desk cross references against manufacturer data at no cost.
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Orders are checked against your vehicle details before they are sealed, then dispatched quickly.
Before you start the job, the NHTSA vehicle safety hub is worth five minutes.
Before you order
Can you check fitment before I order?
Share your vehicle details with our team and we cross reference this listing before dispatch. Anything doubtful gets a message from us rather than a shipment.
How fast does this ship?
We ship from a USA warehouse with quick dispatch, and delivery estimates appear at checkout once you enter your address.
What if it does not fit?
Returns are handled in one reply for most cases. Keep your order confirmation, since it is the only proof of purchase we need.
What quality checks does this get?
We verify diameter and reinforcement specification on every hose order.

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