QA1 Rear Coil-Over Conversion Kit, 73-79 F-100/F-150, Long Box

QA1 engineered a unique torque arm design that maximizes performance without the inherent binding issues of other systems, all while achieving a 4" to 7" drop. This bolt-in system also offers incomparable adjustability: the watts link, torque arm, trailing arms, bracket mounts, and shocks are all adjustable.

• Fits Long Wheelbase 1973 - 1979 Ford F-Series F100/F150 Trucks
• Rear Coil-Over Conversion Kit
• Single Adjustable Coil-Over Shocks
• Available in Multiple Spring Rates (lbs./in.): 170, 200, and 250

Single-Adjustable Coil-Overs

Single-adjustable shocks are perfect for street-driven trucks that see occasional time on the track. With a simple turn of the adjustment knob, you can cruise with a super soft setting, or dial up the valving for more aggressive handling for those twisty backroads.

With registration, your shocks can be backed with a best-in-class Limited Lifetime Warranty.

Adjustable Lower Trailing Arms

Adjustable lower trailing arms allow you to dial in your wheel base for the perfect wheel and tire fitment inside your wheel well.

Unique Watts Link Design

Keep your rear end housing centered in the truck with QA1's unique watts link design. This compact system keeps your tires from rubbing the sides of your bed, while providing clearance for rear exiting exhaust systems.

Easy, Bolt-In Installation

Parts come powder coated and ready to install with all necessary hardware. You can bolt up the kit right in your garage or work with your local shop. Designed for installation with the bed on the truck. No bed removal necessary.

Fitment Notes

This system ONLY fits long wheelbase trucks.

This system is designed to use a stock 1973-1979 F100 / F150 9" axle with and iron 3rd member or a direct fit aftermarket 9in axle with an iron 3rd member. Aluminum 3rd member will NOT work.