Precision suspension.
Purpose built.
Custom suspension parts for cars and trucks — engineered and manufactured in-house. Air ride systems, lowering kits, lift kits, four-link systems and custom one-off components. Built to take the hit.
Find your parts
Every suspension system and component ESD manufactures, organized by type.
Featured products
Selected suspension components and complete systems.
Need a part that doesn't exist yet?
Standard catalog parts don't cover every application. If you have an unusual vehicle, a custom setup, or dimensions that nothing off the shelf will fit — ESD engineers and fabricates custom one-off suspension components to your exact specifications. Bring your measurements, your design drawings, or just describe the problem. We'll build the solution.
Complete air ride kit
Full front and rear airbag conversion engineered for most domestic trucks and SUVs. Every component manufactured in-house at our Ontario, CA facility — bags, brackets, lines and mounting hardware included. Bolt-on fit, no custom fabrication required.
- Front and rear airbag assemblies included
- Powder-coated steel mounting brackets
- Fits most 1988–current domestic trucks
- Compatible with all major air management systems
- Lifetime support from the team that built it
Parts manufacturing and installation
ESD is a suspension parts manufacturer. Every component in our catalog is designed, fabricated and quality-checked at our Ontario, CA facility before it ships. We also offer installation services for customers local to the Inland Empire area.
View all servicesEvery component in the ESD catalog — bags, brackets, control arms, four-link systems, step notches — is designed and manufactured in-house. No overseas blanks with our name on them.
When no catalog part fits, we build it from scratch. Bring us your vehicle specs, your design, or just your problem. ESD engineers custom suspension components to exact application requirements.
Complete air ride installs for customers at our Ontario, CA facility. ESD-manufactured bags and brackets with air management setup included.
Full kit installs at our shop — drop spindles, flip kits, lowering shocks, lift kits and extended control arms. Alignment included.
Step notches and C-notches welded and reinforced to allow maximum drop clearance without axle contact. Measured, cut and finished at our facility.
Every component is designed, fabricated and quality-checked at our Ontario, California facility before it ships.
No overseas sourcing, no white-label parts. What you buy from ESD is built by ESD — in California.
Tell us your vehicle, your application and what you need. We'll engineer a part that fits.
Request a custom quoteWhy builders choose ESD.
We're not a distribution company. Every part we sell is something we designed, built and tested at our facility in Ontario, California.
About Elite Suspension DesignEvery component — bags, brackets, control arms, four-link systems — is fabricated at our Ontario, CA shop. No overseas parts with our name stamped on them.
If a part doesn't fit your application as specified, we make it right. We build what we sell, so we know exactly how it should go in.
ESD parts are tested at full drop and maximum lift — not just at stock ride height. If it can't handle the application, it doesn't leave the shop.
When you call ESD, you're talking to the people who make the parts. Technical questions get real answers — not a script. Custom requirements get real solutions.
Technical resources
Guides, comparisons and suspension education from the ESD team.
How to choose the right air suspension system for your truck
Bags vs. coilovers, management options, and what to ask before you buy. A plain-English breakdown from the people who build them.
Read guide →
Step notches vs. C-notches: which is right for your build?
Understanding the difference in clearance, strength and cost — and when one is the right call over the other.
Read guide →
Four-link vs. leaf spring: understanding rear suspension options
Ride quality, geometry, cost and complexity compared. What a four-link actually gives you and when it's worth the investment.
Read guide →What builders are saying
Ordered a four-link kit for my '02 Silverado and the fit was dead-on. Every hole lined up, hardware was all there, and the welds on the brackets were clean. These guys clearly know what they're making.
Best quality bags and brackets I've found. The air ride kit went in clean and customer service actually knew what they were talking about. Called twice with tech questions — both times got a real answer, fast.
Ordered a step notch kit and had it in less than a week. The welds are clean, fitment was spot-on and the instructions were clear enough to follow. Hard to say that about most custom parts.
Needed a custom bracket for an unusual application on a stretched truck. Called ESD and they had a solution designed and quoted within a day. Part came out perfect. Don't hesitate to ask about custom work.
Running ESD bag kit for two years on a show Suburban. Never had a pressure issue, bags still hold, ride quality is consistent. The in-house manufacturing makes a difference — you can tell when you put the parts in your hands.
Ready to order?
Shop the catalog for standard suspension parts, or reach out for a custom quote if your application needs something we don't stock. Either way, you're talking to the people who build the parts.