Description
The Mishimoto MMHOSE-GM-23U is a purpose-built silicone upper radiator hose engineered as a direct replacement for the factory rubber hose on 1966-1968 Chevrolet Impala models equipped with a 283 4.6L or 327 5.3L engine. Built from five layers of silicone reinforced with heat-resistant embedded fibers, this Classic Line hose is designed to outlast the degradation-prone rubber it replaces while keeping your Impala’s cooling system running strong on the road or at the show.
As part of the Mishimoto Cooling lineup, this Performance-grade silicone hose is engineered to hold up under high heat and pressure, carrying a maximum temperature rating of 330°F. Two worm-gear clamps are included to simplify installation, and the hose is finished in black to complement a factory-style or restomod engine bay. Whether you’re restoring a numbers-matching classic or building a weekend cruiser, this Mishimoto silicone hose delivers a meaningful upgrade over aging rubber components without altering the classic look of your Chevrolet.
Vehicle Applications
This is a specific-fit hose engineered for a defined range of classic GM and related platforms. It is designed for the 1966-1968 Chevrolet Bel Air, Biscayne, Caprice, and Impala, as well as the 1966-1967 Chevrolet Chevy II and the 1967 Chevrolet El Camino. Coverage also extends to the 1971 Ford Ranchero, the 1972 Checker Aerobus, the Checker Marathon in 1970 and 1975-1979, the 1971-1973 Checker Taxicab, and the 1977-1979 Mercedes-Benz 240D. Always confirm your specific year and engine configuration before ordering.
Features
- Direct fit for the 1966-1968 Chevrolet Impala with a 283 4.6L or 327 5.3L engine
- Constructed from five layers of silicone with heat-resistant embedded fibers
- Improves heat and pressure tolerance versus factory rubber hoses
- Includes high-quality worm-gear clamps for ease of installation
- Available in black
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMHOSE-GM-23U
- Product Type: Cooling
- Hose Material: Silicone
- Hose Color: Black
- Grade Type: Performance
- Universal or Specific Fit: Specific
- Clamps Included: Yes
- Maximum Temperature Rating: 330°F
- Purchase Includes: (1) Silicone Hose, (2) Worm-Gear Clamps, Mishimoto Lifetime Warranty
- Clamp Torque: 22 in-lbs (2.5NM) recommended; operating range 18-27 in-lbs (2-3NM); do not exceed 27 in-lbs (3NM)
Frequently Asked Questions
What is the Mishimoto MMHOSE-GM-23U designed to fit?
It is a specific-fit silicone upper radiator hose designed for the 1966-1968 Chevrolet Impala with a 283 4.6L or 327 5.3L engine, along with several other listed applications including the Chevrolet Bel Air, Biscayne, Caprice, Chevy II, El Camino, Ford Ranchero, Checker models, and the Mercedes-Benz 240D.
What material is the hose made from?
The hose is constructed from five layers of silicone with heat-resistant embedded fibers, offering improved heat and pressure tolerance compared to a factory rubber hose.
Does the hose come with clamps?
Yes, the purchase includes two worm-gear clamps for installation.
What color options are available?
This hose is available in black.
What is the maximum temperature rating of this hose?
The hose has a maximum temperature rating of 330°F.
What warranty does Mishimoto offer on this hose?
This hose, like all Mishimoto Classic Line parts, includes 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.
