Mazda Mx5 MK2 NB 1.8 Silicone Coolant & Breather Hose Kit

£94.95 - £119.95 (Inc. VAT)
£79.12 - £99.96 (Ex. VAT)
*** International customers (incl. Channel Islands) will only pay the ex. VAT price, but customs charges may be payable to your country on import. Click here for more info.
(4 reviews) Write a Review
1.67 KGS

Note: Some types of coolant are not compatible with silicone hoses. Please click here to download our Important Fitting Notes before buying and fitting silicone hoses.

This high quality reinforced silicone hose kit replaces 11 coolant and breather hoses in the engine bay listed below. The kit contains 13 hoses but there are two versions of the thermostat bypass hose and cam cover breather hose included, one for MK2 models and one for MK2.5 models.

  1. Upper Radiator Inlet Hose
  2. Lower Radiator Outlet Hose
  3. Heater Matrix Inlet Hose
  4. Heater Matrix Outlet Hose
  5. Thermostat Bypass Coolant Hose (MK2 only - use below for MK2.5)
  6. Thermostat Bypass Coolant Hose (MK2.5 only - use above for MK2)
  7. Thermostat Housing to Throttle Body Coolant Hose
  8. Cam Cover to Air Intake Breather
  9. PCV Valve to Inlet Manifold Breather (MK2 only - use below for MK2.5)
  10. PCV Valve to Inlet Manifold Breather (MK2.5 only - use above for MK2)
  11. Oil cooler inlet hose
  12. Oil cooler outlet hose
  13. Radiator to Expansion Tank Hose

Hose Clamps:

The kit is available with a full set of hose clamps using the options above. The three types of clamp we offer are shown below, but not all options will appear for some kits due to size limitations:

Stoney Racing Stainless Steel Worm-Drive Clamps, Black Coated Spring Clamps and Stainless Steel T-Bolt Clamps

Spring clamps are the most commonly used type by vehicle manufacturers. They provide excellent evenly distributed clamping force and are generally the best option for clamping coolant hoses, but they can be fiddly to fit/remove, and being mild steel they are more prone to surface rust over time. Whilst this won't affect the performance or lifespan of the clamp some customers prefer our stainless steel options below which tend to look better and still perform as they should.

Worm-Drive clamps have slightly less evenly distributed clamping force as the Spring type clamps, but they are still a good quality clamp and usually easier to fit/remove in the tight confines of an engine bay. Being 100% stainless steel they do not rust, so we recommend this type of clamp if you are concerned about the appearance of your engine bay.

T-Bolt clamps are the most heavy duty clamps we supply, and are also 100% stainless steel to prevent rust. However they are much more expensive and, like the Worm-Drive clamps provide a slightly less evenly distributed clamping force than the Spring clamps. For this reason we recommend using them for Turbo applications (intercooler/intake hoses) where high boost can cause hose blow-off's and the additional clamping force is useful. Some customers like to use T-Bolt clamps for all hoses on their vehicle however so we offer them as an option for most of our kits.

For some vehicles the original clamps can be reused so we also offer our kits without clamps, but please be aware our silicone hoses are slightly thicker than the standard hoses so in some cases the original clamps may be too small.


  • Application: Mazda Mx5/Miata NB (MK2/MK2.5) Chassis '98-'05 | 1.8 BP-Z3 Engine | Manual & Automatic Transmissions | RHD & LHD Models
  • Construction: ~4.5mm 4-ply silicone with 3-ply polyester reinforcing
  • Max Operating Pressure: >7bar
  • Burst Pressure: >10bar
  • Operating Temperature range: -50°c to 180°c
  • Warranty: 3 Years (UK based)

4 Reviews Hide Reviews Show Reviews

  • 5
    Silicone hose kit inc. clamps

    Posted by Jonas Nordlof on 9th Sep 2020

    Nice work and i´ll mount it when the car are in for the winter

  • 5
    Very good quality

    Posted by Unknown on 1st Sep 2020

    i recommend it

  • 5
    Great product

    Posted by Dylan on 18th May 2020

    Great feeling hoses, seems to fit well and looks good.

  • 5
    Silicone hose kit for Mx5 Mk2 1.8

    Posted by Steve Bluck on 7th Apr 2020

    Excellent service and prompt delivery (even through the current lockdown). Spent a nice day gently changing each of the hoses (apart from the devils ones!