• AST Suspension 5100 Series Coilovers (Excludes Front/Rear Top Mounts) (True Coilover) - 1988-1991 Porsche 944 2.5 Turbo S (Type 2)
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AST 5100 Series Coilovers Porsche 944 2.5 Turbo S Type 2 (ACU-P2013S) | 88-91

AST 5100 Series Coilovers Porsche 944 2.5 Turbo S Type 2 (ACU-P2013S) | 88-91

ACU-P2013S

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The AST 5100 Series Coilovers for the Porsche 944 2.5 Turbo S (Type 2) are high-performance suspension components designed to enhance handling and stability. Featuring inverted, upside-down shock absorber technology, these coilovers are race-proven and deliver increased strength and durability. The design improves suspension geometry under heavy lateral and braking loads, making them ideal for both street and track use. The 5100 Series coilovers provide superior damping performance compared to standard twin-tube shocks, with adjustable rebound settings accessible via a single knob for precise tuning. Constructed with high-quality materials, these coilovers ensure consistent performance and longevity, even under demanding driving conditions.

Designed to fit 1988-1991 Porsche 944 2.5 Turbo S (Type 2) models, these coilovers are a direct upgrade for stock suspension systems. They are suitable for enthusiasts seeking improved handling, cornering, and ride quality on both street and track environments. Installation is straightforward, with bolt-on compatibility for the specified vehicle years and models. The kit includes coilover assemblies tailored for performance driving, providing a significant upgrade over factory components. These coilovers are ideal for drivers looking to optimize their Porsche 944’s suspension for spirited driving, track days, or aggressive street use.

Overview

The 5100 Series shock absorbers for the 1988-1991 Porsche 944 2.5 Turbo S (Type 2) utilize inverted / upside down technology. The inverted design is race proven technology and produces an extremely strong damper, providing better suspension geometry under heavy lateral and braking loads as seen in a road and track environment.

The 5100 Series shock absorbers give your car a better performance than the standard twin tube design. With the 5100 Series suspension you can adjust rebound with one knob. The adjust platform allows you to adjust the ride height of your car. AST suspension shock bodies are specially designed to keep maximum stroke, even with a lower ride height.

How a Monotube design works?

Monotube design is essential for performance. The oil and nitrogen are separated by a floating piston, and allows the use of a larger piston, increasing the damper performance and sensitivity felt by the driver, all this added together produces more grip, gives more control and driver feedback from your vehicle.

What is a rebound adjustment?

Rebound controls the rate of extension of your shock absorber. By changing the rebound you can directly change the characteristics of the vehicle.

Features

  • Floating piston design with high pressure nitrogen means no cavitation around the piston.
  • 14mm diameter internal shaft.
  • 44.5 mm diameter shaft struts, inverted.
  • Steel cylinder body shocks, inverted.
  • High end, track ready suspension.
  • Rebound adjustable ('Singles').
  • Low friction seal.
  • Adjuster knobs permanently mounted on the dampers.
  • Designed to use OEM top mounts.
  • Rubber bushings for 'eye' shock mounts.
  • Includes springs.
  • Rebuildable.
  • Optional spherical top mounts.
  • Optional DLC (diamond like carbon) coated shafts.
  • Optional DDP (double digressive piston).
    • Double Digressive Pistons are recommended for use on the non-driven wheels.
    • 4WD/FWD vehicles: DD pistons for both rear axle struts/shocks.
    • RWD vehicles: DD pistons for both front axle struts/shocks.
  • Optional custom valving.
Specifications
  • Part Number: ACU-P2013S
  • Product: AST 5100 Series
  • Adjustment: 1 Way
  • System: Coil Over
  • Product Note: True Coilover
  • Front/Rear Ratio: Front = 60% / Rear = 40%
  • Strut/Shock Type: Front: Bracket McPherson strut / Rear: Eye 2 eye strut
  • Model Years: 1988-1991
  • Make: Porsche
  • Model: 944
  • Chassis: Type 2
  • Spring Kit: Included
  • Top Mounts: Front / Rear Optional (If Available)
  • Optional 1 Front Top Mounts: TMA-P05-A1-20F - Camber adjustable
  • Optional 2 Front Top Mounts: Not Available
  • Optional Rear Top Mounts: N/A - Eye to eye (No top mounts)
  • Adjustable Front Droplinks Available? No
  • Adjustable Front Droplinks Required? No
  • Adjustable Rear Droplinks Available? No
  • Adjustable Rear Droplinks Required? No
  • DDP Pistons Included? No
  • DDP Pistons Available? Yes
  • DLC Coated Shafts Included? No
  • DLC Coated Shafts Available? Yes
  • QDC Included? No
  • TUV Approved?
  • Comments: Works with OE top mounts.
Vehicle Fitment
  • 1988 Porsche 944 2.5 Turbo S (Type 2)
  • 1989 Porsche 944 2.5 Turbo S (Type 2)
  • 1990 Porsche 944 2.5 Turbo S (Type 2)
  • 1991 Porsche 944 2.5 Turbo S (Type 2)
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