High-flow digressive single-adjustable 500 Series coilover system for Explorer ST
24-step damping gives flexible tuning for both street comfort and occasional track use
High-pressure monotube design with nitrogen for consistent performance under load
T6 6061 aluminum mounts for strength and lightness
Fully rebuildable and revalveable for long-term serviceability
Modular upgrade path: compatible with 2-way or 3-way canister setups
or as low as $164.83/mo with Affirm
Single-adjustable monotube for the 2020-2024 Explorer ST (U625) — 6K/12K Swift-rear spec. The family hauler that corners. Custom. Modular. Rebuildable.
Fortune Auto engineers are consistently chasing improvement, and the Generation 8 500 Series is the proof. Every set is hand-assembled to your order, dyno-tested with a printed curve, and built on a platform you can rebuild, revalve and upgrade instead of replace.
The Explorer ST application ships at 6K front / 12K rear (Swift rear spring standard) — dialed for the U625’s weight without killing the daily ride. Custom rates? Call 805-267-9762.
Race-track R&D tuned for the street: optimized for comfort, reliability and longevity. Rides like a quality OEM sport setup — until you ask for more.
Stiff low-speed compression and rebound control roll, dive and squat — while fast shaft speeds stay supple over curbs and bumps for maximum grip.


The force/velocity curve says it all: strong low-speed force for body control, then the curve flattens so fast hits stay supple. That’s the digressive advantage.







Spring upgrades: pick Default, Swift (+$200) or Hyperco (+$200) fronts in the dropdown above. Custom rates for your build — call 805-267-9762 before ordering.
You'll get an instant confirmation email with your part details and invoice. We source from a network of authorized suppliers across the country, so lead times vary by brand and part type — we'll send a tracking number the moment your parts move.
Made-to-order builds — carbon fiber bodywork, fabricated systems, custom finish work — run longer than off-the-shelf items because they're built per order. You'll get progress updates throughout the build.
Need a specific timeline on a part before you buy? Call 805-267-9762 or hit the chat — we'll check vendor stock direct and give you a straight answer.
Absolutely! Once your order ships, you'll get an email with a tracking link so you can follow its journey from our shop to your doorstep.
If your order ships via freight, you'll get a separate email with a direct link to the carrier's tracking page — easy and stress-free.
Things happen on the road — even to boxes. If your order arrives damaged, snap a few clear photos of the box and product and send them our way right away.
If your shipment is lost, just email or call us — we'll help track it down and guide you through the next steps to make it right.
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