Keep hardworking commercial trucks and buses riding under control with the Monroe Magnum 66653 Front Suspension Shock Absorber. This gas-charged Magnum shock is built for the demands of high-mileage, severe-use Class 3–6 vehicles, and it installs in the FRONT position on a wide range of medium-duty applications — including the 1986-2020 Isuzu NPR, 1999-2024 Isuzu NPR-HD, 2005-2025 Isuzu NRR, 1987-2010 Chevrolet W4500 Tiltmaster, 1992-2010 GMC W4500 Forward, and 2016-2024 Chevrolet LCF 4500. See the Buyer's Guide tab for the full list of 21 applications and engine details.
Backed by Monroe's 90-Day Risk Free Ride Offer and Limited Commercial Warranty.
What is the Monroe Magnum 66653?
It's a gas-charged front suspension shock absorber designed for Class 3–6 commercial trucks and buses, built to handle high-mileage and severe-use service.
Where does this shock install?
The catalog lists it as a FRONT position shock absorber for the listed applications. Confirm fitment for your vehicle in the Buyer's Guide tab.
What vehicles does the 66653 fit?
It covers 21 applications, including Isuzu NPR, NPR-HD and NRR, Chevrolet W4500/W5500 Tiltmaster and LCF models, and GMC W4500/W5500 Forward. See the Buyer's Guide for the full list.
What does the gas charge do?
The nitrogen gas charge helps maintain tire-to-road contact and reduces aeration and shock fade, supporting a stable, more comfortable ride.
What are signs my shocks may need replacing?
Excessive vibration, a bouncing or unstable ride, and reduced control can indicate worn shocks. Have the suspension diagnosed to confirm the cause before replacing.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
