Description
The Mishimoto MMHOSE-GM-15U is a black silicone upper radiator hose engineered as a direct-fit upgrade for the 1967-1969 Pontiac Firebird equipped with a 326 5.3L, 350 5.7L, or 400 6.6L. Built from five layers of silicone reinforced with heat-resistant embedded fibers, this Performance-grade Cooling component replaces the factory rubber hose that is prone to cracking, softening, and collapsing under heat and age.
Swapping to a Mishimoto silicone hose means trading degradation-prone rubber for a construction designed to hold up to a 330°F maximum temperature rating while resisting the heat and pressure cycling that wears out stock hoses. Whether the Firebird sees daily driving duty or weekend cruising, this hose is built to keep coolant flowing reliably between the engine and radiator. Two worm-gear clamps are included so the hose can be installed without hunting down separate hardware, and it’s backed by the Mishimoto Lifetime Warranty for long-term peace of mind on a classic cooling system upgrade.
Vehicle Applications
This specific-fit silicone hose covers the 1967-1970 Pontiac Firebird Base, with additional coverage for the Firebird 400 (1967-1969), Firebird 350 (1968-1969), Firebird HO (1967), Firebird Trans Am (1969-1970 and 1977-1978), and Firebird Formula (1977-1978). It also fits a broad range of other Pontiac full-size and muscle car models sharing the same cooling system layout, including the Bonneville Base, Catalina Base, Catalina 2+2, and Catalina Ventura (1965-1970 depending on trim), Executive Base (1967-1970) and Executive Safari (1968-1970), Grand Prix Base (1965-1967), GTO Base (1966-1970), LeMans Base (1966-1970), Star Chief Base (1965-1966) and Star Chief Executive (1966), and Tempest Base (1966-1970). Coverage extends beyond Pontiac as well, fitting the 1970-1971 Dodge D100, D200, D300, W100, W200, and W300 pickups, as well as the 1969 Ford Custom, Galaxie 500, and LTD Base models.
Features
- Direct fit for the 1967-1969 Pontiac Firebird with a 326 5.3L, 350 5.7L, or 400 6.6L
- Constructed from five layers of silicone with heat-resistant embedded fibers
- Improves heat and pressure tolerance versus factory rubber hoses
- Includes worm-gear clamps for ease of installation
- Available in black
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMHOSE-GM-15U
- Product Type: Cooling
- Hose Material: Silicone
- Hose Color: Black
- Maximum Temperature Rating: 330°F
- Clamps Included: Yes
- Grade Type: Performance
- Universal or Specific Fit: Specific
- Purchase Includes: (1) Silicone Hose, (2) Worm-Gear Clamps, Mishimoto Lifetime Warranty
- Recommended clamp torque: 22 in-lbs (2.5NM); operating range 18-27 in-lbs (2-3NM); do not exceed 27 in-lbs (3NM)
Frequently Asked Questions
What material is the Mishimoto MMHOSE-GM-15U hose made from?
It is constructed from five layers of silicone with heat-resistant embedded fibers, giving it a Performance grade rating.
What is the maximum temperature rating of this hose?
This Mishimoto silicone hose carries a maximum temperature rating of 330°F.
Does this hose include clamps for installation?
Yes, two worm-gear clamps are included with the hose for ease of installation.
What vehicles does the MMHOSE-GM-15U fit?
It is a specific fit for the 1967-1970 Pontiac Firebird (including 350, 400, HO, Trans Am, and Formula trims across their listed years), as well as the Pontiac Bonneville, Catalina, Catalina 2+2, Catalina Ventura, Executive, Executive Safari, Grand Prix, GTO, LeMans, Star Chief, Star Chief Executive, and Tempest within their listed year ranges. It also fits the 1970-1971 Dodge D100/D200/D300 and W100/W200/W300 pickups and the 1969 Ford Custom, Galaxie 500, and LTD.
What comes in the box with this hose?
The package includes (1) Silicone Hose, (2) Worm-Gear Clamps, and the Mishimoto Lifetime Warranty.
What color options are available for this hose?
This hose is available in black.
⚠ 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.
