The Monroe® Magnum® Rear Suspension Shock Absorber for class 3-6 vehicles is gas-charged for quicker response and a stable, more comfortable ride. Designed for high mileage and severe use vehicles, it replaces worn units to help reduce excessive vibration.

A direct-fit rear replacement for Blue Bird All American FE and RE school buses, the Magnum is backed by Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.

• For Hardworking Commercial Vehicles: Designed for high mileage and severe use class 3-6 trucks and buses.
• Consistent Ride: All-weather fluid with special additives handles extreme temperatures; 2-in. or 2-1/4-in. reserve tube holds more fluid (when required).
• Exceptional Handling: 10-Stage valving tuned per vehicle; larger 1-3/8-in. bore for more efficient damping and a smoother ride (most applications).
• Strong and Durable: Shouldered and bonded bushing with sleeve prevents bushing walkout; arc welds up to 360° for durability.
• Built to Last: Hydraulic lock-out prevents over-extension of air bags and protects the seal assembly (most applications).
• Longer Service Life: PTFE-coated bearing and nitrocarburized piston rod for durability and extended service life (most applications).
• Reduced NVH: Isolates impact-related noise, vibration, and harshness under most driving conditions.
• Improves Performance: Nitrogen gas-charge maintains tire-to-road contact by reducing aeration and shock fade.
• Buy with Confidence: Comes with Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.

Common Fits: Blue Bird All American RE (1989-2020) and Blue Bird All American FE (1989-2020). All fitments are rear position.

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Cross References:
Hendrickson: S21292, Hendrickson: S23650, Watson & Chalin: 17300, Blue Bird: 1526417, Sachs: 315541, Sachs: 317533, KYB: 345602, Volvo GM Heavy Truck: 3919569, Neway: 57306607, Monroe Shocks & Struts: 600166, Mack: 600166MT, Monroe Shocks & Struts: 6607, Gabriel: 665759, Meritor: 665769, NAPA Shocks: 66607, Gold Shock Absorber: 8160100, Gabriel: 85052, Neway: 90044833, Neway: 90044834, Hendrickson: A21292, Automann: A85052, Navistar: AMS600166, Hendrickson: B21947, Hendrickson: B23744, FCS: F347196, Bulldog HD: HD12140542, Meritor: M85052, Volvo GM Heavy Truck: RCSA5052, Volvo GM Heavy Truck: SA5052, Haldex: SA66607, KYB: 345604, KYB: 6460006, KYB: KG6006, Haldex: 85052, Dayton Parts: 441850526607, 66607

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UPC:

048598075482

Mfr Part Number:

66607

Country of origin (CO):

US

Color:

Black

Compressed Length:

9.9375 (unece.unit.INH)

Cylinder Color:

Black

Cylinder Finish:

Painted

Dust Shield Included:

Yes

Dust Shield Material:

Metal

Extended Length:

13.4688 (unece.unit.INH)

Gas Charged:

Yes

Grade Type:

Premium

Hydraulic Lockout:

Yes

Includes Bump Stop:

No

Internal Rebound Bumper:

No

Lower Mount Code:

LS54

Lower Mount Type:

Loop (Eyelet) Bushing and Sleeve

Mounting Hardware Included:

No

Shock Absorber Body End Measuring Point:

Center of Loop

Shock Absorber Rod End Measuring Point:

Center of Loop

Travel Length:

3.531 (unece.unit.INH)

Upper Mount Code:

LS54

Lower Mount Code48:

LS54

Upper Mount Code74:

LS54

Lower Mount Type49:

Loop Bushing and Sleeve Mount - 3/4" Sleeve ID X 1.3/4" Sleeve OAL

Upper Mount Type75:

Loop Bushing and Sleeve Mount - 3/4" Sleeve ID X 1.3/4" Sleeve OAL