What is the difference between a monotube and twin-tube shock absorber?

Monotube dampers, like these from AST, use a single tube with a large piston. This design prevents oil and gas from mixing, leading to more consistent and responsive damping. Twin-tube shocks have a separate inner and outer tube, which can be more prone to foaming under hard use.

Can I use my original top mounts with these coilovers?

Yes, these coilovers are designed to work with your factory OEM top mounts. This simplifies the installation process and helps maintain the original mounting points.

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

Ride height is adjusted by threading the spring perch up or down on the shock body. Rebound damping is adjusted using the knob on top of the damper, with 12 distinct positions to choose from.

Specifications

Brand: AST
Part #: ACU-P2201S
UPC: astACU-P2201S

AST 5100 Series Shock Absorbers Coil Over Porsche Boxter 986

Name: AST 5100 Series Shock Absorbers Coil Over Porsche Boxter 986
Brand: AST
SKU: ast-ast-5100-series-shock-absorbers-coil-over-porsche-boxter-986-t14-341828
Price: 4112.64 USD
Availability: BackOrder

$4112.64

On Backorder

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

Fits 1997-2004 Porsche Boxster. AST 5100 Series coilovers offer 1-way adjustable rebound and ride height for improved grip and handling.

Key Features

Direct fit — verified for 1997-2004 Porsche Boxster
Monotube dampers — large piston for precise rebound damping control
Adjustable ride height and rebound — fine-tune your car's stance and handling
12 rebound adjustment positions — customize damping for different driving conditions
Includes springs — designed to work with OEM top mounts
Front and rear dampers are true coilovers — offers maximum adjustability

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About this part

Product Details

AST makes this 5100 Series coilover suspension for the 1997-2004 Porsche Boxster. If you want to dial in your car's handling for street use, these are a solid option. They let you control how the car settles after hitting bumps and adjust how high or low the car sits. This set includes springs and is made to work with your factory top mounts.

The monotube design uses a large piston to control rebound damping. This design prevents air from mixing with the oil, so the damping is more consistent and responsive. You can adjust the rebound in 12 distinct positions. This lets you fine-tune the car's balance for your driving style and road conditions. The dampers are also rebuildable at a certified AST service center.