AST Suspension 5100 Series Coilovers

The AST 5100 Series is the entry point into AST's motorsport-grade coilovers: a monotube, fixed-damping kit that rides beautifully on the street while delivering serious track capability. At Springrates we carry the 5100 Series for a wide range of applications.

AST 5100 Series: Motorsport Monotube

The 5100 Series brings AST's Dutch motorsport engineering to a single-adjustable (height) monotube coilover. The damping is fixed but expertly valved, which is exactly why so many fast-road and track-day drivers love it — you get a superbly controlled, high-quality ride without fiddling with clickers. And because it's a true AST damper, it's fully rebuildable and revalvable as your build evolves.

Who the 5100 Series Is For

The 5100 is ideal for the driver who wants premium damper quality and ride control without needing multi-way adjustment. It's a favorite for fast-road cars and track-day builds. If you later want independent bump and rebound control, the 5200 (2-way) and 5300 (3-way) Series step you up within the same AST family.

Browse the 5100 Series, or compare with the 5200 and 5300 Series. Need help matching a kit to your car and how you drive it? Call us at 903-993-0000 or email support@springrates.com and we'll help you choose before you spend a dollar.

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FAQs

Is the AST 5100 Series good for the street?

Yes, exceptionally. The 5100's expertly valved monotube damping gives a superbly controlled, high-quality ride on the street while remaining fully track-capable. It's a favorite for fast-road and track-day cars.

Does the AST 5100 have adjustable damping?

No, the 5100 Series has fixed (but expertly valved) damping and height adjustment. For independent bump and rebound adjustment, step up to the 5200 Series (2-way) or 5300 Series (3-way).

Can the AST 5100 be rebuilt?

Yes. As a genuine AST motorsport damper, the 5100 Series is fully rebuildable and revalvable, so it can be serviced and re-tuned as your build changes.

Why choose the 5100 over an adjustable coilover?

Many drivers don't need multi-way adjustment and prefer AST's expertly set damping out of the box. The 5100 delivers premium ride control and quality without clickers, at a lower price than the multi-way kits.

What's the difference between the 5100, 5200, and 5300?

The 5100 is fixed-damping, the 5200 adds 2-way (bump and rebound) adjustment, and the 5300 offers full 3-way adjustment. All share AST's motorsport construction and rebuildability.

Do I need an alignment after installing the AST 5100?

Yes. Any ride-height change alters camber and toe, so an alignment is required afterward — corner weighting is also worthwhile on a track build.

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