The Monroe 66412 Magnum Shock Absorber is a heavy-duty, gas-charged front suspension shock designed for demanding commercial vehicle applications. Built for Class 3–6 trucks and buses, the Magnum series is engineered to provide consistent ride control, improved handling, and long-lasting durability in high-mileage and severe-use conditions.
The 66412 features a large 1.37-inch bore, 10-stage valving, and nitrogen gas charging to help maintain tire-to-road contact while reducing shock fade and aeration. Durable loop bushing and sleeve mounts provide secure installation and dependable performance.
Key Features & Benefits
- Monroe Magnum heavy-duty shock absorber
- Gas-charged design for responsive suspension control
- Designed for commercial trucks and buses
- Large 1.37-inch bore for improved damping performance
- 10-stage valving for consistent ride control
- Helps reduce shock fade and aeration
- Durable construction for high-mileage and severe-duty applications
- Loop bushing and sleeve mounting design
- Dust shield included
- Black painted finish
- New replacement unit
Specifications
| Specification |
Details |
| Part Number |
66412 |
| Series |
Magnum |
| Type |
Shock Absorber |
| Position |
Front |
| Gas Charged |
Yes |
| Bore Diameter |
1.37 in |
| Extended Length |
18.12 in |
| Compressed Length |
11.67 in |
| Travel |
6.45 in |
| Upper Mount |
Loop Bushing & Sleeve |
| Lower Mount |
Loop Bushing & Sleeve |
| Sleeve ID |
5/8 in / 16 mm |
| Sleeve Overall Length |
2 in |
| Dust Shield |
Yes |
| Mounting Hardware |
Not Included |
| Finish |
Black |
Specifications are supported by current Monroe 66412 listings and dimensional references.
Applications
Monroe 66412 is listed for the following commercial vehicle applications:
- 2008–2015 IC Corporation BE School Bus
- 2013–2018 IC Corporation CE School Bus
- 2013–2018 International 4300
- 2019–2024 International MV607
Fitment can depend on the specific front suspension or axle configuration. Verify vehicle application and suspension specifications before ordering.
Interchange / Cross Reference
Common cross-reference numbers include:
-
International / Navistar: 3533356C3, 3605735C1, 3605735C2, 4164146C1
-
Gabriel: 83156, 83169
-
Fleetrite: AMS66412
-
Haldex: SA66412
-
Meritor: M83156
-
FCS: F347342
-
Bulldog HD: HD1214-0558
-
Dayton Parts: 44183156
-
NAPA: 66412
Cross-reference numbers are provided for identification purposes; always verify exact application before purchase.