Buying the HPS Black Silicone w/Coil Insert Radiator Hose Coolant Kit For 99-04 Jeep Grand Cherokee 4.0L I6 (WJ) should be simple, so here are the facts without the marketing noise.
Inner diameter must match the fitting exactly, since eyeballing sizes is how leaks begin. Keep petroleum away from standard silicone unless the hose is lined for it.
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.
The coil insert radiator hose coolant listed here is checked against your vehicle before dispatch.
Every coil insert radiator hose coolant order goes through the same fitment review.
Ordering the coil insert radiator hose coolant takes a minute and the confirmation reaches you straight away.
Key details
- Engine: 4.0L I6
- Material: Silicone
- Finish: Black
- 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: Black
- 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-BLK, 52079401AB, 52079406AC, 57-2129
We would rather answer a question before you buy than process a return afterward, so ask freely.
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Orders placed before early afternoon usually leave our USA warehouse the same business day, with tracking emailed at label creation.
When you want a second opinion that is not a parts store, read the Car Care Council maintenance tips.
Before you order
Will this part fit my vehicle?
We verify every doubtful order by hand. Give us the year, make, model and engine option and we will confirm compatibility in one reply.
When will my order dispatch?
Same business day dispatch applies to orders placed before the early afternoon cutoff, with tracking that updates at every carrier scan.
Can I return this part?
Report any transit damage with a photo and we will send a replacement or refund you. We handle the carrier claim ourselves.
Is this checked before shipping?
Lines and fittings are checked for pressure rating, inner diameter and ply count before shipping.

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