Description
The Mishimoto Silicone Oil Cooler Hose (MMHOSE-392-21OC) is a direct-fit replacement for the factory oil cooler hose on the Jeep Wrangler JL Rubicon 392, built specifically to fix the OEM rubber’s tendency to crack and collapse at its bend under the repeated heat cycling the 392 V8 generates in trail and low-speed use. Rather than the factory design that splits at its point of greatest flex, Mishimoto engineered this hose as a single continuous silicone piece that holds its shape through the bend, eliminating the failure mode at its source.
As a Mishimoto Fabrication product, this oil cooler hose is built around a smooth internal taper that runs the full length of the hose, removing the pressure pockets and flow restriction created by the factory plastic joiner at its step change. Embedded fiber reinforcement is woven throughout the silicone wall to resist expansion and collapse under sustained system pressure, addressing the softening and distortion that eventually degrades factory rubber. Worm-gear clamps are included so the connection at each end stays secure and remains field-serviceable long after installation.
Vehicle Applications
This Mishimoto silicone oil cooler hose is a confirmed direct fit for the Jeep Wrangler Unlimited Rubicon 392 from 2021–2022, the Jeep Wrangler Rubicon 392 from 2023–2024, the Jeep Wrangler Rubicon 392 Final Edition from 2024–2025, and the 2026 Jeep Wrangler Moab 392. Installation requires no drilling, cutting, or modification to the vehicle.
Features
- One-piece silicone construction replaces the factory hose at its known failure point, eliminating the bend where OEM rubber cracks and splits
- Smooth internal taper runs the full length of the hose, preventing the pressure pockets and flow restriction created by the factory plastic joiner
- Embedded fiber reinforcement throughout the silicone wall resists expansion and collapse under sustained pressure
- Worm-gear clamps included for a secure, field-serviceable connection at each end
- Direct fit for applicable Jeep Wrangler 392 models — no drilling, cutting, or modification required
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Hose End 1 Outside Diameter: 0.5 IN
- Hose End 2 Outside Diameter: 0.8 IN
- Hose End 1 Inside Diameter: 0.3 IN
- Hose End 2 Inside Diameter: 0.6 IN
- Coolant Hose Color: Black
- Coolant Hose Type: Single
- Heat Shield Included: No
- Maximum Temperature Rating: 347 F
- Engine Code: ESG
- Chassis Code: JL
- Includes: (1) Oil Cooler Hose, (2) Worm Gear Clamps, Mishimoto Lifetime Warranty
Frequently Asked Questions
What vehicles does this Mishimoto oil cooler hose fit?
It is a direct fit for the Jeep Wrangler Unlimited Rubicon 392 (2021–2022), Jeep Wrangler Rubicon 392 (2023–2024), Jeep Wrangler Rubicon 392 Final Edition (2024–2025), and the 2026 Jeep Wrangler Moab 392.
What comes in the box?
The kit includes (1) oil cooler hose, (2) worm gear clamps, and coverage under the Mishimoto Lifetime Warranty.
What is the maximum temperature rating?
The hose is rated to a maximum temperature of 347 F.
Does this hose include a heat shield?
No, a heat shield is not included with this hose.
Do I need to modify anything to install this hose?
No. It is a direct fit with no drilling, cutting, or modification required.
What warranty is included?
This hose is backed by the Mishimoto Lifetime Warranty.
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
