Technology
Inside an HD Shock
Standard IFP, remote reservoir and billet piggyback. No fluff. Here's what's inside and why it matters.
Standard IFP
Oil on one side, nitrogen on the other, kept apart by a floating piston inside the shock body. The oil can't mix with gas and foam up, so the shock gives you the same control mile after mile. Best for rigs that carry about the same load every day.
Cutaway of an HD Shocks 2.5 inch IFP monotube shock cycling through its stroke. Oil flows through ports in the piston and bends the shim stacks that control compression and rebound. A floating piston inside the shock body keeps the oil separate from the nitrogen charge, so the oil never mixes with gas and foams up.
The floating piston
Inside every HD Shock is an internal floating piston, or IFP. It sits between a charge of nitrogen gas and the shock oil and keeps them apart. That matters, because when gas and oil mix, the oil foams up and the shock fades.
Consistent damping
With the gas and oil kept separate, the shock does the same job on the first bump as it does after hours of rough road. No fade, no surprise. And clean oil lasts longer.
Bigger than OEM
Our shock bodies are larger than the factory ones. More oil, a bigger piston and more surface to shed heat. That adds up to better control, especially on heavy vehicles that work the shocks hard.
Built to be serviced
Every HD Shock can be rebuilt. When it's time, send it in instead of throwing it away.
Our shock oil
The oil does the real work in a shock. Damping happens when oil is forced through the piston and shims, so the oil decides how consistent your ride feels. HD Shocks run our own blend of high-performance shock oil, the same class of oil used in trophy trucks, spec'd for heavy-duty work. Why the oil matters