KYB Rear Shock Gas-A-Just 4WD F-100 1970-1979



  • Monotube Design
  • Restores Factory Ride
  • Direct-Fit Replacement
  • Eliminates Performance Fade
MSRP $61.22
You save 24%

KYB Gas-A-Just Rear Shock for 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978 and 1979 4WD F-100s.

The KYB Gas-A-Just Rear Shock KG5421 delivers performance advantages over traditional, twin-tube shocks, making it the go-to part for your 1970-1979 4WD F-100. The KYB monotube shock responds instantly to driver input and never experiences fade due to aeration.

The use of two different chambers allows the nitrogen gas and hydraulic fluid to remain separate to eliminate aeration and foaming altogether. You'll experience a comfortable ride quality and maintaining consistent damping forces no matter the condition. To prevent fluid leakage and eventual shock failure, the Gas-A-Just features a triple chrome-plated piston rod to reduce seal wear for long-lasting durability. Get this tried-and-true rear shock for your classic pickup today!

Features and Benefits:
- Restores Factory Ride
- Monotube Design
- Direct-Fit Replacement
- Easy Installation
- Responds Instantly to Driver Input
- Improved Handling
- Provides Consistent Damping

California Residents: Proposition 65 Warning

Vehicle Fitment

This product will fit the following F-100 years:

  • 1970,
  • 1971,
  • 1972,
  • 1973,
  • 1974,
  • 1975,
  • 1976,
  • 1977,
  • 1978,
  • 1979,
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