Description
The Mishimoto Silicone Lower Radiator Hose (MMHOSE-GM-4L) is a specific-fit replacement engineered for the 1967-1969 Pontiac Firebird, built from five layers of silicone reinforced with heat-resistant embedded fibers to take the place of the factory rubber hose that is prone to cracking and collapsing with age. Finished in black and rated to a maximum temperature of 330°F, this Performance-grade Classic Line hose is designed to give a decades-old Firebird cooling system a genuine upgrade in durability.
Rubber hoses harden, crack, and swell over time, and on a classic Firebird that can mean an unreliable cooling system right when you need it most. This Mishimoto silicone hose addresses that with a multi-layer silicone build that improves heat and pressure tolerance over the original equipment, while the included worm-gear clamps make installation straightforward. Whether the Firebird sees daily driving duty or weekend cruising, this Cooling system upgrade is backed by the Mishimoto Lifetime Warranty, so you get long-term peace of mind along with the performance benefit.
Vehicle Applications
This silicone lower radiator hose is a specific fit for the 1967-1969 Pontiac Firebird lineup, covering the Firebird Base and Firebird HO for 1967, the Firebird 400 for 1967-1969, the Firebird 350 for 1968-1969, and the Firebird 350 HO and Firebird Trans Am for 1969. It is designed as a direct fit for Firebirds equipped with a 326 5.3L, 350 5.7L, or 400 6.6L engine.
Features
- Constructed from five layers of silicone with heat-resistant embedded fibers
- Improves heat and pressure tolerance compared to the original rubber hose
- Includes worm-gear clamps for ease of installation
- Available in black
- Performance-grade, specific-fit design for the 1967-1969 Pontiac Firebird
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMHOSE-GM-4L
- 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
- Recommended clamp torque: 22 in-lbs (2.5NM); operating range 18-27 in-lbs (2-3NM); do not exceed 27 in-lbs (3NM)
- Purchase Includes: Silicone hose, worm-gear clamps, Mishimoto Lifetime Warranty
Frequently Asked Questions
What vehicles does this Mishimoto hose fit?
It is a specific fit for the 1967-1969 Pontiac Firebird, covering the Firebird Base and HO trims (1967), Firebird 400 (1967-1969), Firebird 350 (1968-1969), and Firebird 350 HO and Trans Am (1969).
Which engines is this hose designed for?
It is a direct fit for the 1967-1969 Pontiac Firebird equipped with a 326 5.3L, 350 5.7L, or 400 6.6L engine.
What material is the hose made from?
The hose is constructed from five layers of silicone with heat-resistant embedded fibers.
Are clamps included with this hose?
Yes, worm-gear clamps are included for ease of installation.
What color options are available?
This hose is available in black.
Does Mishimoto back this hose with a warranty?
Yes, it 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.















