How do I adjust the ride height and rebound on these coilovers?

The AST 5100 Street Series Coilovers allow for adjustment of both ride height and rebound damping. You can fine-tune the rebound using the knob, which has 12 distinct positions, to achieve your desired road balance. Refer to the manufacturer's instructions for specific adjustment procedures.

Do I need to buy new top mounts for these coilovers?

No, these coilovers are designed to work with your vehicle's original equipment (OEM) top mounts. This means you can reuse your existing top mounts during installation.

What makes a monotube damper design better?

Monotube dampers, like those used by AST, feature a larger piston. This allows for more precise control over rebound damping and prevents aeration or foaming. This results in more responsive valving and consistent performance, especially under demanding driving conditions.

AST 06-08 BMW Z4 M Coupe/Convertible - E85/E86 5100 Street Series Coilovers

Specifications

Brand: AST
Part #: ACU-B2203SD
UPC: astACU-B2203SD

AST 06-08 BMW Z4 M Coupe/Convertible - E85/E86 5100 Street Series Coilovers

Name: AST 06-08 BMW Z4 M Coupe/Convertible - E85/E86 5100 Street Series Coilovers
Brand: AST
Price: 4080.00 USD
Availability: InStock

$4080.00

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2006-2008 BMW Z4 M Coupe/Convertible. AST 5100 Street Series Coilovers offer 1-way adjustable rebound and ride height for improved grip and handling.

Key Features

Direct fit — verified for 2006-2008 BMW Z4 M Coupe/Convertible
Monotube dampers — use a large piston for better rebound control
Adjustable ride height and rebound — fine-tune your car's balance
Front and rear coilovers — prioritizes adjustability and performance
Includes springs — ready to install with OEM top mounts
12 rebound adjustment positions — customize your driving feel

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Fits this vehicle

BMW Z4 2006-2008

Product Details

AST uses a monotube damper design. This means a larger piston inside, which gives you more control over the rebound damping. Monotube dampers don't get foamy like twin-tube designs, so the valving stays responsive. These dampers also offer additional resistance based on driving conditions, improving performance when you need it. Plus, they're rebuildable at a certified AST service center if any issues come up.