Monroe

Magnum OE Replacement Shocks

66891
$69.99

In Stock

Estimated Delivery in 3-7 business days

Monroe

Magnum OE Replacement Shocks

66891
$69.99

In Stock

Estimated Delivery in 3-7 business days

Authorized dealer
Free shipping on orders above $250 within the lower 48 United States
Brand new parts with warranty coverage
Free 30-day return and exchange on qualifying orders
Got Questions?
Our experts are here to help!
Part Numbers & Details
1 Shock Absorber
Package contains a single shock.
Monroe Limited Lifetime Warranty
Manufacturer provided lifetime warranty and exclusive Feel the Difference Guarantee.
Factory Hardware for Installation
All necessary washers, bushings, and nuts included. Factory shock mounting bolts are reused for installation.
Designed for Trucks and Vans
Engineered for hardworking full-size trucks and vans and features full-displaced valving on compression cycles to deliver controlled ride and handling
Heavy Duty Build
Heavy-duty nitrocarburized rod (non-dust shield units only) and sintered iron piston enhance durability for longer service life while self-lubricating fluid seal reduces friction against piston rod to reduce wear
Nitrogen gas charge
Maintains tire-to-road contact for improved ride and handling by reducing aeration and shock fade
Specifications
Part NumberLift/LoweredPositionItemQuantityExtended LengthCompressed LengthTravelTop MountBottom Mount
66891FactoryRearShock Absorber126.72"16.3"10.42"EYELETEYELET
Product Details

Designed for midsize and full-size trucks and vans, Monroe Gas-Magnum shock absorbers provide firm control without a harsh ride. With up to twice the fluid capacity of standard 1-in. bore shocks, they work more efficiently with less effort.

Compatibility List
YearMakeModelDrivePosition
1990FordB600Rear
1989FordB600Rear
1988FordB600Rear
1987FordB600Rear
1986FordB600Rear
1985FordB600Rear
1984FordB600Rear
1983FordB600Rear
1982FordB600Rear
1981FordB600Rear
1980FordB600Rear
1990FordB700Rear
1989FordB700Rear
1988FordB700Rear
1987FordB700Rear
1986FordB700Rear
1985FordB700Rear
1984FordB700Rear
1983FordB700Rear
1982FordB700Rear
1981FordB700Rear
1980FordB700Rear
1986FordB7000Rear
1985FordB7000Rear
1984FordB7000Rear
1983FordB7000Rear
1990FordF600Rear
1989FordF600Rear
1988FordF600Rear
1987FordF600Rear
1986FordF600Rear
1985FordF600Rear
1984FordF600Rear
1983FordF600Rear
1982FordF600Rear
1981FordF600Rear
1980FordF600Rear
1990FordF700Rear
1989FordF700Rear
1988FordF700Rear
1987FordF700Rear
1986FordF700Rear
1985FordF700Rear
1984FordF700Rear
1983FordF700Rear
1982FordF700Rear
1981FordF700Rear
1980FordF700Rear
1990FordF800Rear
1989FordF800Rear
1988FordF800Rear
1987FordF800Rear
1986FordF800Rear
1985FordF800Rear
1984FordF800Rear
1983FordF800Rear
1982FordF800Rear
1981FordF800Rear
1980FordF800Rear
1999International9400Rear
2007MackMRRear
2006MackMRRear
2005MackMRRear
2004MackMRRear
2003MackMRRear
2002MackMRRear
2001MackMRRear
2000MackMRRear
1999MackMRRear
1998MackMRRear
1997MackMRRear
1996MackMRRear
1995MackMRRear
1994MackMRRear
1993MackMRRear
1992MackMRRear
1991MackMRRear
1990MackMRRear
1989MackMRRear
1988MackMRRear
1987MackMRRear
1986MackMRRear
1985MackMRRear
1984MackMRRear
1983MackMRRear
1982MackMRRear
1981MackMRRear
2005MackRBRear
2004MackRBRear
2003MackRBRear
2002MackRBRear
2001MackRBRear
2000MackRBRear
1999MackRBRear
1998MackRBRear
1997MackRBRear
1996MackRBRear
1995MackRBRear
1994MackRBRear
1993MackRBRear
1992MackRBRear
1991MackRBRear
1990MackRBRear
1989MackRBRear

Monroe Manufacturer's Warranty

DRiV warrants qualifying Monroe products against defects and wear-out when used on private passenger cars and light trucks under normal operating conditions, for as long as such original purchaser owns the vehicle on which they were originally installed.

Qualifying Products

  • Monroe OESpectrum shocks and struts
  • Monroe Reflex shocks and struts
  • Monroe Quick-Strut assembly
  • Monroe Gas-Magnum shocks
  • Monroe Magnum loaded strut assembly
  • DRiV's obligation under this warranty is limited to replacement of the worn-out or defective product in accordance with this warranty. Cost of removal and installation are not included, and any incidental and consequential damages are excluded under this warranty, regardless of when the failure occurs. This warranty has no cash value.

    To make a claim under this warranty, return the worn-out or defective product with the dated original receipt to the dealer or retailer from whom it was purchased.

    This warranty does not apply to purchases made through unauthorized retailers/dealers including unauthorized online sellers. DRiV has no way to confirm the authenticity and quality of products sold through unauthorized resellers and is not obligated to honor warranty claims when purchased from an unauthorized individual, unauthorized retailer/dealer, or unauthorized online retailer. Purchases made through auction sites, marketplaces, private or third-party sales, or other unauthorized online retailers are not eligible for warranty.

    This warranty does not apply to: (i) any other costs, including costs of removal, installation, diagnostic time, and any other expenses arising out of replacing the product (ii) products which have been installed on non-catalogued applications; (iii) products that are new, unused or show signs of normal wear but not defective; (iv) products which have been misused, modified, altered, improperly applied or installed; (v) product damaged in an accident or by fire, weather, or any other force majeure event or hazard; (vi) products which have been installed on vehicles used for commercial, fleet, Governmental or racing purposes or damaged due to vehicle modifications; (vii) obsolete parts no longer available from DRiV; (viii) product that has been transferred from the vehicle on which it was originally installed; (ix) non-geniune DRiV branded product or competitive parts; and (x) products installed on vehicles that have been modified outside the specifications of the vehicle’s original equipment manufacturer, including but not limited to aftermarket modifications for racing, off-road, or powersports purposes.

    DRiV will not accept any returns and is not responsible for any claims related to circumstances and products described in the preceding sentence. All warranties, express or implied, are disclaimed if not stated herein. Any implied warranties you may have under state law are limited to the same duration and other terms as this warranty to the extent permissible.

    DRiV will contact warranty-serviced consumers to conduct customer satisfaction surveys relating to product and warranty service. Survey activity will provide valuable feedback and help measure the level of consumer satisfaction in different markets.

    Shipping Info

    Free Shipping on most orders to the lower 48 U.S. states. Truck freight items (over 100 lbs) and custom orders require a separate shipping quote.

    • Applies to items like axles, leaf springs, and long-travel kits.
    • No international shipping on freight items — only to U.S.-based freight forwarders.
    • Worldwide shipping available: Canada, Europe, UAE, Australia, and most of Asia.

    Contact us for an international shipping quote.

    Returns & Exchanges

    30-Day Return Policy — Items must be new, unused, uninstalled, and include all original hardware.

    • No restocking fees for exchanges or gift card credit.
    • 10% restocking fee on refunds, returns cost us real money, so the 10% helps keep the lights on.
    • Installed, damaged, or dirty parts cannot be returned.
    • Any returns missing hardware or miscellaneous items, the return will be denied and returned to the buyer at the buyer's expense.

    Need help? Use Live Chat or Email Us anytime.

    Start a Return or Exchange

    Return Shipping Responsibility

    CHECKOUT+ Package and Order Protection plan provides prepaid return labels for any returned packages, this fee varies by product.

    • Our mistake (misboxed, wrong item, damaged): We cover the cost of return shipping.
    • Buyer mistake (wrong item ordered, fitment error, changed mind): Return shipping is the buyer's responsibility - unless CHECKOUT+ Package Protection has been purchased.

    • Under 50 lbs: Discounted carrier rate
    • Over 50 lbs: Discounted carrier rate + $25 oversize fee

    Refunds

    Refunds are issued within 5–7 business days of receiving your return.

    • Funds typically post to your account in 1–3 business days depending on your payment method.
    • There is a 10% restocking fee on all refunds. We don’t get our original shipping, labor, or transaction fees back — so the 10% restocking fee keeps the lights on.
    • You will receive an email once your refund is processed.

    International Orders

    • All international orders are final sale.
    • Returns via freight forwarders only accepted if the product hasn’t left the U.S.
    • Import taxes, duties, and other possible import-related fees are the buyer’s responsibility and not included in our shipping charges.
    • We are not responsible for goods once exported outside the U.S.

    Product Details

    Whether you want to upgrade, add a reservoir, or find something more affordable, contact us with any questions!

    Part Numbers & Details

    View full product specifications

    Close specs
    Part Numbers & Details
    1 Shock Absorber
    Package contains a single shock.
    Monroe Limited Lifetime Warranty
    Manufacturer provided lifetime warranty and exclusive Feel the Difference Guarantee.
    Factory Hardware for Installation
    All necessary washers, bushings, and nuts included. Factory shock mounting bolts are reused for installation.
    Designed for Trucks and Vans
    Engineered for hardworking full-size trucks and vans and features full-displaced valving on compression cycles to deliver controlled ride and handling
    Heavy Duty Build
    Heavy-duty nitrocarburized rod (non-dust shield units only) and sintered iron piston enhance durability for longer service life while self-lubricating fluid seal reduces friction against piston rod to reduce wear
    Nitrogen gas charge
    Maintains tire-to-road contact for improved ride and handling by reducing aeration and shock fade
    Specifications
    Part NumberLift/LoweredPositionItemQuantityExtended LengthCompressed LengthTravelTop MountBottom Mount
    66891FactoryRearShock Absorber126.72"16.3"10.42"EYELETEYELET
    Product Details

    Designed for midsize and full-size trucks and vans, Monroe Gas-Magnum shock absorbers provide firm control without a harsh ride. With up to twice the fluid capacity of standard 1-in. bore shocks, they work more efficiently with less effort.

    Compatibility List
    YearMakeModelDrivePosition
    1990FordB600Rear
    1989FordB600Rear
    1988FordB600Rear
    1987FordB600Rear
    1986FordB600Rear
    1985FordB600Rear
    1984FordB600Rear
    1983FordB600Rear
    1982FordB600Rear
    1981FordB600Rear
    1980FordB600Rear
    1990FordB700Rear
    1989FordB700Rear
    1988FordB700Rear
    1987FordB700Rear
    1986FordB700Rear
    1985FordB700Rear
    1984FordB700Rear
    1983FordB700Rear
    1982FordB700Rear
    1981FordB700Rear
    1980FordB700Rear
    1986FordB7000Rear
    1985FordB7000Rear
    1984FordB7000Rear
    1983FordB7000Rear
    1990FordF600Rear
    1989FordF600Rear
    1988FordF600Rear
    1987FordF600Rear
    1986FordF600Rear
    1985FordF600Rear
    1984FordF600Rear
    1983FordF600Rear
    1982FordF600Rear
    1981FordF600Rear
    1980FordF600Rear
    1990FordF700Rear
    1989FordF700Rear
    1988FordF700Rear
    1987FordF700Rear
    1986FordF700Rear
    1985FordF700Rear
    1984FordF700Rear
    1983FordF700Rear
    1982FordF700Rear
    1981FordF700Rear
    1980FordF700Rear
    1990FordF800Rear
    1989FordF800Rear
    1988FordF800Rear
    1987FordF800Rear
    1986FordF800Rear
    1985FordF800Rear
    1984FordF800Rear
    1983FordF800Rear
    1982FordF800Rear
    1981FordF800Rear
    1980FordF800Rear
    1999International9400Rear
    2007MackMRRear
    2006MackMRRear
    2005MackMRRear
    2004MackMRRear
    2003MackMRRear
    2002MackMRRear
    2001MackMRRear
    2000MackMRRear
    1999MackMRRear
    1998MackMRRear
    1997MackMRRear
    1996MackMRRear
    1995MackMRRear
    1994MackMRRear
    1993MackMRRear
    1992MackMRRear
    1991MackMRRear
    1990MackMRRear
    1989MackMRRear
    1988MackMRRear
    1987MackMRRear
    1986MackMRRear
    1985MackMRRear
    1984MackMRRear
    1983MackMRRear
    1982MackMRRear
    1981MackMRRear
    2005MackRBRear
    2004MackRBRear
    2003MackRBRear
    2002MackRBRear
    2001MackRBRear
    2000MackRBRear
    1999MackRBRear
    1998MackRBRear
    1997MackRBRear
    1996MackRBRear
    1995MackRBRear
    1994MackRBRear
    1993MackRBRear
    1992MackRBRear
    1991MackRBRear
    1990MackRBRear
    1989MackRBRear
    Warranty

    View warranty coverage

    Close specs

    Monroe Manufacturer's Warranty

    DRiV warrants qualifying Monroe products against defects and wear-out when used on private passenger cars and light trucks under normal operating conditions, for as long as such original purchaser owns the vehicle on which they were originally installed.

    Qualifying Products

  • Monroe OESpectrum shocks and struts
  • Monroe Reflex shocks and struts
  • Monroe Quick-Strut assembly
  • Monroe Gas-Magnum shocks
  • Monroe Magnum loaded strut assembly
  • DRiV's obligation under this warranty is limited to replacement of the worn-out or defective product in accordance with this warranty. Cost of removal and installation are not included, and any incidental and consequential damages are excluded under this warranty, regardless of when the failure occurs. This warranty has no cash value.

    To make a claim under this warranty, return the worn-out or defective product with the dated original receipt to the dealer or retailer from whom it was purchased.

    This warranty does not apply to purchases made through unauthorized retailers/dealers including unauthorized online sellers. DRiV has no way to confirm the authenticity and quality of products sold through unauthorized resellers and is not obligated to honor warranty claims when purchased from an unauthorized individual, unauthorized retailer/dealer, or unauthorized online retailer. Purchases made through auction sites, marketplaces, private or third-party sales, or other unauthorized online retailers are not eligible for warranty.

    This warranty does not apply to: (i) any other costs, including costs of removal, installation, diagnostic time, and any other expenses arising out of replacing the product (ii) products which have been installed on non-catalogued applications; (iii) products that are new, unused or show signs of normal wear but not defective; (iv) products which have been misused, modified, altered, improperly applied or installed; (v) product damaged in an accident or by fire, weather, or any other force majeure event or hazard; (vi) products which have been installed on vehicles used for commercial, fleet, Governmental or racing purposes or damaged due to vehicle modifications; (vii) obsolete parts no longer available from DRiV; (viii) product that has been transferred from the vehicle on which it was originally installed; (ix) non-geniune DRiV branded product or competitive parts; and (x) products installed on vehicles that have been modified outside the specifications of the vehicle’s original equipment manufacturer, including but not limited to aftermarket modifications for racing, off-road, or powersports purposes.

    DRiV will not accept any returns and is not responsible for any claims related to circumstances and products described in the preceding sentence. All warranties, express or implied, are disclaimed if not stated herein. Any implied warranties you may have under state law are limited to the same duration and other terms as this warranty to the extent permissible.

    DRiV will contact warranty-serviced consumers to conduct customer satisfaction surveys relating to product and warranty service. Survey activity will provide valuable feedback and help measure the level of consumer satisfaction in different markets.

    Shipping & Returns

    Free shipping within the lower 48 United States

    Close specs

    Shipping Info

    Free Shipping on most orders to the lower 48 U.S. states. Truck freight items (over 100 lbs) and custom orders require a separate shipping quote.

    • Applies to items like axles, leaf springs, and long-travel kits.
    • No international shipping on freight items — only to U.S.-based freight forwarders.
    • Worldwide shipping available: Canada, Europe, UAE, Australia, and most of Asia.

    Contact us for an international shipping quote.

    Returns & Exchanges

    30-Day Return Policy — Items must be new, unused, uninstalled, and include all original hardware.

    • No restocking fees for exchanges or gift card credit.
    • 10% restocking fee on refunds, returns cost us real money, so the 10% helps keep the lights on.
    • Installed, damaged, or dirty parts cannot be returned.
    • Any returns missing hardware or miscellaneous items, the return will be denied and returned to the buyer at the buyer's expense.

    Need help? Use Live Chat or Email Us anytime.

    Start a Return or Exchange

    Return Shipping Responsibility

    CHECKOUT+ Package and Order Protection plan provides prepaid return labels for any returned packages, this fee varies by product.

    • Our mistake (misboxed, wrong item, damaged): We cover the cost of return shipping.
    • Buyer mistake (wrong item ordered, fitment error, changed mind): Return shipping is the buyer's responsibility - unless CHECKOUT+ Package Protection has been purchased.

    • Under 50 lbs: Discounted carrier rate
    • Over 50 lbs: Discounted carrier rate + $25 oversize fee

    Refunds

    Refunds are issued within 5–7 business days of receiving your return.

    • Funds typically post to your account in 1–3 business days depending on your payment method.
    • There is a 10% restocking fee on all refunds. We don’t get our original shipping, labor, or transaction fees back — so the 10% restocking fee keeps the lights on.
    • You will receive an email once your refund is processed.

    International Orders

    • All international orders are final sale.
    • Returns via freight forwarders only accepted if the product hasn’t left the U.S.
    • Import taxes, duties, and other possible import-related fees are the buyer’s responsibility and not included in our shipping charges.
    • We are not responsible for goods once exported outside the U.S.