KYB

Gas-A-Just Monotube Shocks

KG4540
$65.99

In Stock Estimated Delivery in 3-6 Business Days
KYB

Gas-A-Just Monotube Shocks

KG4540
$65.99

In Stock Estimated Delivery in 3-6 Business Days
Authorized dealer
Free shipping on orders above $175 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
Package Contains 1 Shock
You'll be getting one shock absorber.
KYB Lifetime Warranty
Manufacturer limited lifetime warranty protects against defects and premature failure.
Factory Hardware for Installation
All necessary washers, bushings, and nuts included. Factory shock mounting bolts are reused for installation. Shock boots sold separately.
Product Highlights
Factory Upgrade for improved handling
Specifications
Part NumberLift/LoweredPositionItemQuantityExtended LengthCompressed LengthTravelTop MountBottom Mount
KG4540FactoryFrontShock Absorber118.31"11.42"6.89"STEMEYELET
Product Details

The KYB Gas-A-Just shock absorber increases vehicle stability, handling, and control through a monotube shock design. A monotube shock absorber is more responsive to the road and automatically adjusts to driving conditions. The Gas-A-Just shock will give a slightly firmer ride and provide additional control, limiting body roll and nose dive.

Compatibility List
YearMakeModelDrivePosition
1971JaguarXJFront
1970JaguarXJFront
1969JaguarXJFront
1968JaguarXJFront
1986JaguarXJ12Front
1985JaguarXJ12Front
1984JaguarXJ12Front
1983JaguarXJ12Front
1982JaguarXJ12Front
1981JaguarXJ12Front
1980JaguarXJ12Front
1979JaguarXJ12Front
1978JaguarXJ12Front
1977JaguarXJ12Front
1976JaguarXJ12Front
1975JaguarXJ12Front
1974JaguarXJ12Front
1973JaguarXJ12Front
1986JaguarXJ6Front
1985JaguarXJ6Front
1984JaguarXJ6Front
1983JaguarXJ6Front
1982JaguarXJ6Front
1981JaguarXJ6Front
1980JaguarXJ6Front
1979JaguarXJ6Front
1978JaguarXJ6Front
1977JaguarXJ6Front
1976JaguarXJ6Front
1975JaguarXJ6Front
1974JaguarXJ6Front
1973JaguarXJ6Front
1972JaguarXJ6Front
1995JaguarXJSFront
1994JaguarXJSFront
1993JaguarXJSFront
1992JaguarXJSFront
1991JaguarXJSFront
1990JaguarXJSFront
1989JaguarXJSFront
1988JaguarXJSFront
1987JaguarXJSFront
1986JaguarXJSFront
1985JaguarXJSFront
1984JaguarXJSFront
1983JaguarXJSFront
1982JaguarXJSFront
1981JaguarXJSFront
1980JaguarXJSFront
1979JaguarXJSFront
1978JaguarXJSFront
1977JaguarXJSFront
1976JaguarXJSFront

Shock Surplus handles KYB's warranty claims; if you encounter a product defect please submit a warranty claim.

View KYB Warranty Information

For more information: View the Shock Surplus Warranty Policy.

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
Package Contains 1 Shock
You'll be getting one shock absorber.
KYB Lifetime Warranty
Manufacturer limited lifetime warranty protects against defects and premature failure.
Factory Hardware for Installation
All necessary washers, bushings, and nuts included. Factory shock mounting bolts are reused for installation. Shock boots sold separately.
Product Highlights
Factory Upgrade for improved handling
Specifications
Part NumberLift/LoweredPositionItemQuantityExtended LengthCompressed LengthTravelTop MountBottom Mount
KG4540FactoryFrontShock Absorber118.31"11.42"6.89"STEMEYELET
Product Details

The KYB Gas-A-Just shock absorber increases vehicle stability, handling, and control through a monotube shock design. A monotube shock absorber is more responsive to the road and automatically adjusts to driving conditions. The Gas-A-Just shock will give a slightly firmer ride and provide additional control, limiting body roll and nose dive.

Compatibility List
YearMakeModelDrivePosition
1971JaguarXJFront
1970JaguarXJFront
1969JaguarXJFront
1968JaguarXJFront
1986JaguarXJ12Front
1985JaguarXJ12Front
1984JaguarXJ12Front
1983JaguarXJ12Front
1982JaguarXJ12Front
1981JaguarXJ12Front
1980JaguarXJ12Front
1979JaguarXJ12Front
1978JaguarXJ12Front
1977JaguarXJ12Front
1976JaguarXJ12Front
1975JaguarXJ12Front
1974JaguarXJ12Front
1973JaguarXJ12Front
1986JaguarXJ6Front
1985JaguarXJ6Front
1984JaguarXJ6Front
1983JaguarXJ6Front
1982JaguarXJ6Front
1981JaguarXJ6Front
1980JaguarXJ6Front
1979JaguarXJ6Front
1978JaguarXJ6Front
1977JaguarXJ6Front
1976JaguarXJ6Front
1975JaguarXJ6Front
1974JaguarXJ6Front
1973JaguarXJ6Front
1972JaguarXJ6Front
1995JaguarXJSFront
1994JaguarXJSFront
1993JaguarXJSFront
1992JaguarXJSFront
1991JaguarXJSFront
1990JaguarXJSFront
1989JaguarXJSFront
1988JaguarXJSFront
1987JaguarXJSFront
1986JaguarXJSFront
1985JaguarXJSFront
1984JaguarXJSFront
1983JaguarXJSFront
1982JaguarXJSFront
1981JaguarXJSFront
1980JaguarXJSFront
1979JaguarXJSFront
1978JaguarXJSFront
1977JaguarXJSFront
1976JaguarXJSFront
Warranty

View warranty coverage

Close specs

Shock Surplus handles KYB's warranty claims; if you encounter a product defect please submit a warranty claim.

View KYB Warranty Information

For more information: View the Shock Surplus Warranty Policy.

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.

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