The Monroe Shocks & Struts Magnum Rear; Front Suspension Shock Absorber (part number 66878) is a direct-fit replacement for 1960-2024 Chevrolet, GMC, Kenworth, and Peterbilt vehicles with engines. Monroe Magnum 66878 Rear; Front Suspension Shock Absorber
Features:
- INSTALLERS ADVANTAGE -- Designed to save time, simplify the job, fix OE design issues, solve customer complaints or enhances durability and longevity
- FOR HARDWORKING COMMERCIAL VEHICLES -- Designed to handle the demands of high mileage and severe use class 3-6 trucks and buses
- CONSISTENT RIDE -- All-weather fluid contains special additives to assist with extreme temperatures and help reduce oil breakdown while 2-in. or 2-1/4-in. reserve tube holds more fluid to improve performance (when required)
- EXCEPTIONAL HANDLING -- 10-Stage valving, tuned specifically to each vehicle, adjusts to road extremes while the larger 1-3/8-in. bore provides more efficient damping control to provide consistency and a smooth ride (most applications)
- STRONG AND DURABLE -- Shouldered bushing and bonded bushing with sleeve protects from bushing walkout for improved quality; arc welds up to 360 deg for durability
- BUILT TO LAST -- Robust hydraulic lock-out prevents over extension of air bags, top-out of the piston and averts damage to seal assembly (on most applications)
- LONGER SERVICE LIFE -- Bearing with PTFE coating reduces friction between rod and rod guide combined with nitrocarburized piston rod provides durability and longer service life (most applications)
- REDUCED NOISE, VIBRATION AND HARSHNESS -- Delivers exceptional control and isolates impact-related noise, vibration, and harshness under most driving conditions
- IMPROVES PERFORMANCE -- Nitrogen gas-charge maintains tire-to-road contact for improved ride and handling by reducing aeration and shock fade
- BUY WITH CONFIDENCE -- Comes with Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty
Specifications:
| Product Grade | Premium |
| Lower Mount Type | Loop Bushing and Sleeve Mount - 3/4" Sleeve ID X 1.3/4" Sleeve OAL |
| Lower Mount Code | LS54 |
| Upper Mount Type | Loop Bushing and Sleeve Mount - 3/4" Sleeve ID X 1.3/4" Sleeve OAL |
| Upper Mount Code | LS54 |
| Part Description | Shock Absorber |
Fits: 1960-2024 Chevrolet, GMC, Kenworth, Peterbilt, and Western Star models including C50, C60, C70, S7, C5000, C6000, C7000, K270 and more. Confirm your year, make, model, and engine before ordering.
Interchanges With: Gold Shock Absorber 9161058, GMC 5549599, Bulldog HD HD12140579, Neway 57306878, International AMS660157, GMC 5398598, Reyco Granning 1672501, Mack 600157MT and 42 more
