The Monroe® Magnum® Rear and Front 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.

This multi-position Magnum shock covers a broad range of Peterbilt, Kenworth, Western Star, Chevrolet, and GMC commercial and fleet platforms, 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: Peterbilt 348, 520, 579, 587 (various years, rear); Kenworth T800, W900, T680, T280, T300, T370, T400, T600A, K300, K370, K270 (various years, rear); Western Star 4700SB and 4700SF (2012-2020, rear); Chevrolet C50, C60 (1960s-1980s, front and rear); GMC C5000, C6000, C7000 (rear). Also covers Kenworth T170 (2008-2018), T270 (2008-2023), and T380 (2022-2024, rear).

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Cross References:
Western Star: 1672501, Kenworth: 1672501, Peterbilt: 1672501, Mack: 14QK2100, Mack: 14QK2100P1, Reyco Granning: 1672501, General Motors: 22012096, General Motors: 22012169, General Motors: 22012196, Mack: 25621798, Sachs: 316320, General Motors: 3192891, General Motors: 3192892, Western Star: 373013412, Volvo GM Heavy Truck: 3919910, General Motors: 4790218, General Motors: 4940653, General Motors: 4975510, General Motors: 5398598, ACDelco: 55077, Kenworth: 5533699, General Motors: 5534401, General Motors: 5534427, General Motors: 5549599, General Motors: 5552115, Neway: 57306878, Neway: 57366878, Monroe Shocks & Struts: 600157, Mack: 600157MT, Monroe Shocks & Struts: 601157, Monroe Shocks & Struts: 660157, Mack: 660157MT, Monroe Shocks & Struts: 661157, NAPA Shocks: 66878, Monroe Shocks & Struts: 6878, Gabriel: 83221, Gabriel: 83321, Koni: 881422, Gold Shock Absorber: 9161058, Navistar: AMS600157, Navistar: AMS660157, Motorcraft: CAX878, FCS: F347315, FCS: F347319, Bulldog HD: HD12140579, PAI: HSA5080, KYB: KG6002A, Monroe Shocks & Struts: OE10219, Neway: OE10219, Fruehauf: UEY1124001, Fruehauf: UEY11241, KYB: 341620, KYB: 341624, KYB: 345030, KYB: 345613, KYB: KG6001A, Gold Shock Absorber: 3919910, Dayton Parts: 44183221, GMC: 5549599, GMC: 22012096, GMC: 22012169, GMC: 22012196, GMC: 3192891, GMC: 3192892, GMC: 4790218, GMC: 4940653, GMC: 4975510, GMC: 5398598, GMC: 5534401, GMC: 5534427, GMC: 5552115, FCS: F347270, 66878

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