AST Suspension - Race & Street Level Suspension Components for M3/M4

[tom @ eas]

EAS is proud to announce a new partnership with AST Suspension North America. Our proximity to AST’s facility in Irvine gives us a unique ability to offer unparalleled support and direct access to their inventory.

AST Suspension is manufactured in the same facility in Holland as Moton Suspension, but while Moton is focused on Motorsport, AST suits a much larger range of street and sport clients. From progressive lowering springs to 3-way adjustable 5300s with external reservoirs, AST offers a product for almost any use or application. AST Suspension is famous for its inverted technology on their flagship 5000 series dampers. Using a 45mm inverted piston or cartridge design increases damper strength in all directions, optimizing cornering and braking forces under any condition. Proven during countless competitions around the world, their design provides an ultra-strong strut and a low frictional resistance.



The AST 5000 series can be built for custom spring rates and damper specifications offering endless possibilities for your track or street BMW. In addition, AST offers off-the-shelf recommendations for a quicker turnaround and immediate shipping. AST has also set up a service network across the country, allowing each 5000 series kit to be serviced and rebuilt quickly and cost-effectively.

AST Suspension offers a complete suspension line, which includes:

- AST Lowering Springs (new for North America)
- AST 2000 Series (new for North America)
- AST 5000 Series including 5100, 5200 and 5300 systems

AST Lowering Springs

AST Lowering Springs
Lowering range: 15-30mm

AST Lowering Springs are made of chrome/silicium material. After winding the springs, the material is heated in order to relax the metal. Springs are then heated from 300 to 460 degrees Celsius depending on the spring thickness. Then the springs are sandblasted (shot peening) and a special coating is applied. Lifetime warranty on all AST Lowering Springs.

AST Suspension - 2000 Series Coilover System

With the 2000 series AST wants to offer a product for a new type of customer. This series is specially setup for tuners and show cars. The performance is up to the AST specifications as far as this is possible for a twin tube system. They are equipped with a fixed damping rate. By doing this we were able to design the shock for a different market.

With the development we really looked at the 4100 series shimstack in order to match these setups. The shocks offer a minimum lowering of 30mm. We have formed springs for most applications, this results in a perfect fitment without need for special spring platforms. This also keeps the noise down to a minimum and makes fitment with OEM top mounts very easy.

Our adjustable platforms are anodized in the well known orange AST color. The 2000 series offers:

- Twin tube system
- Lowering from minimal 30mm up to 60mm
- Formed springs for most applications
- 2 year warranty

AST Suspension - 5100 Series Coilover System - 1 Way

AST Suspension - 5100 Series Coilover System - 1 Way
The 5100 Series shock absorbers utilise 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 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 sensativity 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.

- 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
- Rubber bushings for ”eye” shock mounts
- Optional spherical top mounts
- Optional DLC Coated shafts
- Optional DDP piston (double digressive)
- Rebuildable
- Optional custom valving

AST Suspension - 5200 Series Coilover System - 2 Way

AST Suspension - 5200 Series Coilover System - 2 Way
The 5200 Series are 2-way adjustable shock absorbers which are based upon competition 3-way adjustable shock absorbers. The 5200 shock absorbers are adjustable in compression and rebound.

The design of the compression adjuster is an evolution of the compression adjuster we provided for the American Grand-Am series for the last few years. The 5200 shock absorbers were designed to achieve a quick and easy set up, allowing separate adjustment of compression and rebound.

In the 5200 Series AST uses an external canister. Throughout testing and competitions, the 5200 has been praised for its performance and capabilities, surpassing other major, more expensive brands and setting a new standard of 2 way damper. Its no surprise that the 5200 is fast becoming a favorite damper amongst race teams and track day enthusiasts world wide.
Benefits include:

- High end, track ready suspension that is totally streetable
- Fully upgradeable to 5300 spec
- Rebound and Compression Adjustable (‘Doubles’), with a remote reservoir
- Remote reservoirs allow additional travel and heat dissipation
- 44.5mm diameter shaft struts, Inverted
- New low friction seal on all AST dampers
- Spherical lower ‘’eye’’ shock mounts
- Reservoir with hose or piggyback
- Spherical upper shock mount assemblies
- Synthetic hydraulic fluid
- Optional DLC Coated shafts
- Optional DDP piston (double digressive)

AST Suspension - 5300 Series Coilover System - 3 Way

AST Suspension - 5300 Series Coilover System - 3 Way
For the absolute best performance on the track, AST Suspension designed the Competition 3-way adjustable series. The 5300 Series shock absorbers are rebound adjustable in 12 positions on the strut.

The high-speed compression is adjustable in 12 positions and the low-speed compression is adjustable in 14 positions. Both compression adjustments are made using an external canister. All adjusters work completely independent.

Many years of technical knowledge, testing and experience has been refined, fettled and brought together to create a perfect balance between the choice of springs and the corresponding damping characteristics. This makes it a versatile product for every customer. The 5300 series shock absorbers are the best solution for every race team. Once installed te shock absorbers are easy to setup, highly reliable and require low maintenance during the season because of the high grade of materials used.

All of this together makes the 5300 series shock absorbers a championship winning damper, over and over again. The AST 5300 Suspension is worldwide renowned for its performance at every level.

Benefits include
- High end, track ready suspension
- Rebound, Low & Hi Speed Compression Adjustable (‘Triples’), with a remote reservoir
- Remote reservoirs allow additional travel, heat dissipation and oil/nitrogen gas capacity
- 44.5mm diameter shaft struts are inverted and offer exceptional strength, which in turn reduces geometry change under corner and braking maneuvers
- Aluminum cylinder, threaded body shocks, factory mounting style
- New low friction seal on all AST dampers
- Spherical lower ”eye” shock mounts
- Reservoir with hose or piggyback (piggyback examples: ’08 STI & BMW E36 rears)
- Spherical upper shock mount assemblies
- Synthetic hydraulic fluid
- Optional DLC Coated 44,5mm inverted shafts
- Optional DDP piston (double digressive)
- Fully serviceable and rebuildable
- Revalvable for specific characteristics

We will be continuously be adding info and pictures to the thread as progress, installs and components are received. Questions are welcome in this thread.

[tom @ eas]

reserved

[tom @ eas]

reserved