Can I use my stock top mounts with these shocks?

Yes, these AST 5100 Series shocks are designed to work with your vehicle's original equipment manufacturer (OEM) top mounts. This simplifies the installation process.

How do I adjust the ride height and rebound?

Ride height is adjusted by changing the spring perch location on the front coilovers. Rebound damping can be adjusted using the knob on the top of the damper, with 12 distinct positions available to fine-tune your driving experience.

Are these shocks suitable for track use or just daily driving?

While designed for improved road balance for everyday use, the adjustable rebound and ride height allow you to tune the suspension for spirited driving. The monotube design also offers consistent performance under various conditions.

Specifications

Brand: AST
Part #: ACU-B1501S
UPC: astACU-B1501S

AST 5100 Series Shock Absorbers Non Coil Over BMW 3 series - E30

Name: AST 5100 Series Shock Absorbers Non Coil Over BMW 3 series - E30
Brand: AST
SKU: ast-ast-5100-series-shock-absorbers-non-coil-over-bmw-3-series-e30-t14-341756
Price: 5146.24 USD
Availability: BackOrder

$5146.24

On Backorder

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

Fits 1987-1991 BMW 325is. AST 5100 Series Monotube Shocks offer adjustable rebound and ride height for improved road balance.

Key Features

Direct fit — verified for 1987-1991 BMW 325is, 1991-1992 BMW 318is, 1986-1988 BMW 325, 1984-1987 BMW 325e, and 1984-1985 BMW 318i.
Monotube dampers — use a large piston for precise rebound damping control and prevent aeration or foaming for more responsive valving.
1-way adjustable rebound — control the return to extension of the dampers with 12 distinct positions.
Adjustable ride height — allows you to set the optimal ground clearance for your vehicle.
Front coilover design, rear divorced setup — maintains a comfortable configuration similar to the original equipment manufacturer (OEM) setup.
Includes springs — designed to work with OEM top mounts.

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About this part

Product Details

12 distinct rebound adjustment positions. The AST 5100 Series Non Coil Over Shocks are built for the BMW E30 chassis, specifically targeting drivers who want better road control for daily use. These coilovers help maximize grip by controlling rebound and ride height, offering a more comfortable setup than typical coilover systems while still achieving a solid road balance.

This kit features monotube dampers, which use a large piston for precise rebound damping control. Unlike twin-tube designs, monotube dampers prevent aeration and foaming, leading to more responsive valving. The front dampers use a coilover design, while the rear maintains a divorced setup similar to OEM. This design choice contributes to a more comfortable ride. The kit includes springs and is designed to work with OEM top mounts. Vehicle-specific, fixed spring rates are used for the rear setup, based on extensive development and testing by AST.