Mishimoto MMHOSE-GM-12L Lower Silicone Radiator Hose 1973-1986 GM C/K 305/350

Regular price: $63.95
Regular price: ~~$58.00~~
Sale price: $63.95

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Product Specification:

SKU:MISMMHOSE-GM-12L

MPN: MMHOSE-GM-12L

UPC: 748354022223

Weight: 1.2 lb

Inventory: 2

Type: Radiator Hoses

Vehicle Fitment

1973-1986 Chevrolet C10, C15, C20, C30 (305ci 5.0L V8 / 350ci 5.7L V8, 2WD)
1973-1986 Chevrolet K10, K15, K20, K30 (305ci 5.0L V8 / 350ci 5.7L V8, 4WD)
1973-1986 Chevrolet Blazer (305ci 5.0L V8 / 350ci 5.7L V8, 2WD/4WD)
1973-1986 Chevrolet Suburban (305ci 5.0L V8 / 350ci 5.7L V8, 2WD/4WD)
1973-1986 GMC C/K Truck (305ci 5.0L V8 / 350ci 5.7L V8, 2WD/4WD)
1973-1986 GMC Jimmy (305ci 5.0L V8 / 350ci 5.7L V8, 2WD/4WD)
1973-1986 GMC Suburban (305ci 5.0L V8 / 350ci 5.7L V8, 2WD/4WD)

Fitment Notes

This is the lower radiator hose only - the matching upper radiator hose (MMHOSE-GM-11U or MMHOSE-GM-17U) is sold separately
Fits 305ci (5.0L) and 350ci (5.7L) V8-equipped C/K trucks - does not fit 250ci/292ci inline-6 or 400ci/454ci V8 applications
Available in black only (Classic Line)
Direct OEM-fit replacement - no trimming or modification required

Features

5-layer silicone construction with heat-resistant embedded fibers for superior heat and pressure tolerance over aging OEM rubber hoses
Resists cracking, swelling, and oil-related degradation that causes decades-old rubber hoses to fail
Part of Mishimoto's Classic Line - designed specifically for Squarebody-era GM trucks used as restomod builds, show vehicles, and weekend drivers
Black finish provides a clean, purposeful appearance in the classic engine bay
Includes 2x worm-gear clamps for a complete, secure installation
Backed by the Mishimoto Lifetime Warranty

Specifications

Fitment: 1973-1986 Chevrolet/GMC C/K Trucks, Blazer, Suburban, Jimmy - 305ci (5.0L) and 350ci (5.7L) V8
Hose Position: Lower Radiator Hose
Hose Material: 5-layer silicone with heat-resistant embedded fiber reinforcement
Color: Black
Clamp Torque: 22 in-lbs (2.5 N·m) recommended; range 18-27 in-lbs (2-3 N·m); max 27 in-lbs
Warranty: Mishimoto Lifetime Warranty

Included Components

1x Lower Silicone Radiator Hose (Black)
2x Worm-Gear Clamps

Product Description

The Mishimoto MMHOSE-GM-12L is a direct-fit silicone lower radiator hose for 1973-1986 Chevrolet and GMC C/K Squarebody trucks powered by the 305ci or 350ci small block V8. After decades of heat cycling and coolant exposure, the factory rubber lower hose on these classics becomes brittle, cracks, and leaks - a common failure point on any Squarebody used as a restomod, show truck, or regular driver. This replacement hose is built from 5 layers of silicone with heat-resistant embedded fibers, delivering durability that far outlasts the original rubber in both performance and longevity.

The hose installs directly at OEM routing points with the included worm-gear clamps and requires no cutting or modification. The black silicone finish keeps the engine bay looking clean on builds where authenticity or understated style is the priority. Note that this listing covers the lower radiator hose only - the upper hose is available separately as MMHOSE-GM-11U or MMHOSE-GM-17U depending on fitment. Backed by the Mishimoto Lifetime Warranty.