SDG Billet Aluminum 2.5" Fox Upgrade Reservoir Schrader Endcap Kit

SDG spring kits use race-proven dual-rate designs tuned for your exact model. They restore ride height, improve comfort, and eliminate bottom-outs — the same setups used by championship race teams.

Yes. SDG offers “Ride Now, Pay Later” financing for all complete systems.

Each bundle includes SDG spring kits, reservoirs, clevis & shaft upgrades, and sway bar or limit strap options — all tuned to work as one system.

Yes. Each kit is vehicle-specific and includes the correct rates and preload setup for 2-seat or 4-seat configurations. Just select your model at checkout.

Not usually. Our spring kits are tuned to work with stock valving, but a revalve can enhance performance if you’ve added major weight like cages or accessories.

The SDG reservoir increases nitrogen volume and reduces internal pressure buildup. It prevents heat fade, oil foaming, and premature seal wear — keeping shocks consistent in long desert or dune runs.

They increase durability and smooth travel by using precision-machined materials that resist deflection. It’s a race-grade upgrade for consistent handling.

Absolutely. By maintaining consistent geometry, they prevent unwanted spring movement and reduce top-out harshness.

Stock shafts can flex or score over time. Our race-grade shafts maintain tight tolerances and reduce internal wear — keeping damping consistent.