Keep heavy-duty suspensions damped and settled with the Monroe Magnum Suspension Shock Absorber 65478, a gas-charged unit that installs in the front and rear positions on class 6-8 trucks and buses. It fits applications including the 2002-2020 International 7400, 2002-2020 International 7500, 2003-2007 and 2009-2017 International 7600, 1996-1999 International 9800 SBA, 2018-2026 International HX520, 2008-2014 and 2017-2019 International WORKSTAR 7600, and 2002-2016, 2018-2019 and 2022-2023 Western Star 6900XD — see the Buyer's Guide tab for the full list and engine details.
The Magnum is a gas-charged, large-bore shock designed for air spring and taper leaf suspensions, with a nitrogen gas charge that provides fast response for heavy-duty truck suspension systems.
- Consistent ride: all-weather fluid with special additives helps handle extreme temperatures and reduce oil breakdown, while a larger 2-3/8-in. reserve tube holds more fluid (most applications).
- Exceptional handling: 10-stage valving tuned to each vehicle plus a larger 1-3/4-in. bore for more efficient damping control (most applications).
- Strong and durable: shouldered and bonded bushing with sleeve helps protect from bushing walkout, with arc welds up to 360°.
- Longer service life: PTFE-coated bearing reduces friction between rod and rod guide, combined with a nitrocarburized piston rod (most applications).
Backed by Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.
Frequently Asked Questions
What is the Monroe Magnum 65478?
It is a gas-charged, large-bore Suspension Shock Absorber designed for the air spring and taper leaf suspensions on class 6-8 commercial trucks and buses.
Does this shock mount in the front or rear?
The catalog lists this shock for both front and rear positions. Confirm the correct location and quantity for your vehicle in the Buyer's Guide tab.
What does the nitrogen gas charge do?
The nitrogen gas charge helps maintain tire-to-road contact by reducing aeration and shock fade, providing fast response for heavy-duty truck suspensions.
What are signs this shock may need replacing?
Common signs include excessive bounce, poor ride control, fluid leakage, and worn or damaged bushings. Diagnose the cause before replacing.
What warranty comes with this shock?
It comes with Monroe's 90-day Risk Free Ride Offer and a Limited Commercial Warranty.
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