The Monroe® Magnum® Rear Suspension Shock Absorber for class 6-8 vehicles is the first gas-charged, large-bore shock for air spring and taper leaf suspensions. The nitrogen gas charge provides the fast response essential for today's heavy-duty truck suspension systems.

Engineered for severe-use class 6-8 applications, this Magnum rear shock serves a comprehensive range of Kenworth and Peterbilt heavy trucks, 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 6-8 trucks and buses.
• Consistent Ride: All-weather fluid with special additives handles extreme temperatures; larger 2-3/8-in. reserve tube holds more fluid (most applications).
• Exceptional Handling: 10-Stage valving tuned per vehicle; larger 1-3/4-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: Exceptional control isolating 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: Kenworth W900 (1981-2024), Kenworth T800 (1987-2024), Kenworth T600A (1986-2008), Kenworth T2000 (1997-2011), Kenworth T300 (1995-2008), Kenworth C500 (1981-2016), Kenworth K100 and K100E (1981-2006), Kenworth K300 (1993-2005), Kenworth T400 (1982-1999); Peterbilt 384, 385, 386, 387, 567, 587 (various years). All fitments are rear position.

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Cross References:
Kenworth: 665906, Kenworth: K37429, Kenworth: K37432, Kenworth: K3747, Kenworth: K3749, Peterbilt: 0307420, Peterbilt: 304628, Peterbilt: 307420, General Motors: 3082285, Autocar LLC: 3082285, Sachs: 315551, Volvo GM Heavy Truck: 3919949, Sachs: 410042, KYB: 441600, Neway: 57365404, Mack: 650404, Monroe Shocks & Struts: 650404, NAPA Shocks: 65404, Kenworth: 665902, Kenworth: 665945, Paccar Parts: 680239, Gabriel: 85310, Gabriel: 85326, Gabriel: 85902, Automann: A85310, Automann: A85326, Navistar: AMS650404, FCS: F343375, FCS: F343378, Bulldog HD: HD12150085, Kenworth: K37487, Meritor: M85310, Meritor: M85326, Meritor: M89423, Volvo GM Heavy Truck: RCSA5310, Volvo GM Heavy Truck: SA5310, Haldex: SA65404, Autocar LLC: TX651097, KYB: 341624, FCS: F343368, FCS: F343376, FCS: F344342, FCS: F344343, FCS: F344353, FCS: F344355, FCS: F346598, FCS: F346599, FCS: F346633, FCS: F347215, FCS: F347303, FCS: F347306, Alliance Truck Parts: ABPN32G900034, Alliance Truck Parts: ABPN32O900034, Meritor: SA65404, Peterbilt: 0304628, Dayton Parts: 44185310, GMC: 3082285, Alliance Parts: ABPN32G900034, Alliance Parts: ABPN32O900034, RK2035, 65404

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