PartSmith Co. keeps the HPS Blue Silicone w/Coil Insert Radiator Hose Coolant Kit For 99-04 Jeep Grand Cherokee 4.0L I6 (WJ) in stock so your repair is not waiting on a supplier.

Inner diameter must match the fitting exactly, since eyeballing sizes is how leaks begin. Route clear of heat sources and moving components.
Stock of the coil insert radiator hose coolant is live on this page rather than estimated.
Shops order the coil insert radiator hose coolant from us in volume because the data on the page is accurate.
If your build is unusual, tell us and we will confirm the coil insert radiator hose coolant against it.
The coil insert radiator hose coolant ships protected, because a damaged part helps nobody.
Drivers choose the coil insert radiator hose coolant here for honest specification detail and quick dispatch.
Buyers comparing the coil insert radiator hose coolant will find the specification detail on this page rather than in a catalog footnote.
What you are buying
- Engine: 4.0L I6
- Material: Silicone
- Finish: Blue
- Category: Hose Kits
- Price: $161.60 with free shipping over $99
- Availability: in stock, dispatched from the USA
Manufacturer specifications
This HPS High Temp 3-ply Reinforced Silicone Radiator Coolant Hose Kit is designed to replace stock OEM rubber upper and lower radiator hoses which weaken and fail over time. With premium quality silicone and performance inspired design, this coolant hose kit can withstand the harsh, high temperature and high pressure operating conditions under the hood through a wide range of driving conditions. The lower radiator hose features a stainless steel coil insert to prevent collapsing from negative pressure, a common issue for these vehicles.
HPS silicone hose kits have all the correct bends and dimensions to perfectly fit as replacements for OEM rubber coolant hoses. Compared to the universal hoses from the local auto store, HPS silicone hose kits are much easier to work with. Maximum temperature rating: 350 degrees Fahrenheit. 100% stainless steel embossed hose clamps are included for easy installation.
- Material: 3-Ply Reinforced Silicone / Stainless Steel Coil Insert
- Color: Blue
- Ideal replacement and durable upgrade for OEM rubber upper and lower radiator hoses which weaken and fail over time.
- Withstands harsh high temperature and high pressure operating conditions that range from daily driving to competition off-roading. Max. temperature rating: 350F (177C).
- Includes HPS 100% stainless steel industrial grade embossed hose clamps which will not cut through silicone hoses.
- Lower radiator hose features a stainless steel coil insert to prevent collapse under negative pressure.
- Compatible with OEM part numbers 52079401AB, 52079406AC.
Application:
For 1999-2004 Jeep Grand Cherokee 4.0L I6 (WJ)
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 Radiator 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:
- 57-2129-BLUE, 52079401AB, 52079406AC, 57-2129
Message us the vehicle details and we will confirm compatibility, including anything unusual about your build.
Keep shopping: Hoses & Fittings · HPS Black 3-Ply Reinforced Silicone Breather Hose Kit For 95-98 Nissan Skyline GTR RB26DETT Twin Turbo (R33) · HPS Black Ancillary Hose Kit (Bypass Coolant Hose) For 01-05 Mazda Miata 1.8L Non Turbo (NB2) · full catalog
Orders are checked against your vehicle details before they are sealed, then dispatched quickly.
A neutral reference for this work is the Car Care Council maintenance tips.
Frequently asked questions
How do I know this is the right part?
The application text on this page lists what the part serves. If your vehicle is not clearly covered, send the VIN and we will rule on it before you pay.
How quickly can I get this?
Dispatch is normally the same or next business day, and heavy items travel on freight with a booked delivery window.
Can I return this part?
Parts are covered against defects for the period stated on this page, and non defect returns follow our standard returns window.
Is the part inspected before dispatch?
We verify diameter and reinforcement specification on every hose order.
![HPS Push-on Hose End to AN Female Fitting [120 Degree] [-12] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/150-120_1_635e984b-3fc3-4cc7-aaac-b24669ef133f-300x300.jpg)
![HPS AN 3-Way Tee Adapter (Tee with female on run) Fitting [Tee] [AN -6] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN9261_1_13ceb207-d699-42c1-9a48-035b83f670cc-300x300.jpg)
![HPS NPT Allen Plug Fitting [1/8 NPT] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN932_1_11e3bb56-b4df-4954-84cd-0d354b2dd8ff-300x300.jpg)
![HPS AN Male to NPT Adapter Fitting [Straight] [-8 to 1/4 NPT] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN816-06-X_pic1_1_8fbe7cf9-52b7-41cb-9b7c-e7396fcd09ae-300x300.jpg)
Reviews
There are no reviews yet.