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E46 AST Suspension

With their race-proven quality and performance, AST Suspension is one of Turner Motorsport’s recommended choices. Outfit your weekend warrior or track dedicated BMW with a suspension designed for optimum performance and adjustable to fit your driving style precisely. Their suspension ranges from street performance to competitive track use. All AST suspension for supported BMWs can be found on this page.
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AST Suspension 5100 Series Coilover Kit - E46

Looking for a rugged, track ready coilover kit that screams quality? Then look no further than AST Suspension's 5000 series coil over kits. 

For starters, all 3 of their 5000 series coilovers (the 5001, 5002, and 5003 series) utilize a race proven inverted shock absorber design which produces an extremely strong damper that provides better suspension geometry under heavy lateral and braking loads as scene in road and track conditions.

Second, is the use of a monotube internal design. The separation of the oil and nitrogen gas by a floating piston allows for the use of a larger shock piston, increasing the damper performance and sensitivity. This adds more grip at the wheels which means more control and feedback from your vehicle.

Third is Adjustment. The 5100 series offers up to 12 different setting for rebound adjustment. Rebound controls the rate of extension of your shock absorber and with slight changes, can directly change the characteristics of the suspension and vehicle handling.

Coilover Kit Specifications:

  • Average lowering from 0.80" to 2.80" front and rear
  • 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.​
  • Rebuildable.

*This suspension system is a true coilover system and will eliminate the rear barrel springs.

Fits the following BMW's:
1999-2006 E46 BMW All Submodels

AST Suspension
Part #: ACU-B1106SCO
Price: $2449.00 (USD) 
Direct Ship
Quantity:   
AST Suspension 5100 Series Coilover Kit - E46 Non-M RWD, Z4 Non-M

Looking for a rugged, track ready coilover kit that screams quality? Then look no further than AST Suspension's 5000 series coil over kits.

For starters, all 3 of their 5000 series coilovers (the 5001, 5002, and 5003 series) utilize a race proven inverted shock absorber design which produces an extremely strong damper that provides better suspension geometry under heavy lateral and braking loads as scene in road and track conditions.

Second, is the use of a monotube internal design. The separation of the oil and nitrogen gas by a floating piston allows for the use of a larger shock piston, increasing the damper performance and sensitivity. This adds more grip at the wheels which means more control and feedback from your vehicle.

Third is Adjustment. The 5100 series offers up to 12 different setting for rebound adjustment. Rebound controls the rate of extension of your shock absorber and with slight changes, can directly change the characteristics of the suspension and vehicle handling.

Coilover Kit Specifications:

  • Average lowering from 0.80" to 2.80" front and rear
  • 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.​
  • Rebuildable.

*This suspension system is a true coilover system and eliminates the rear barrel spring.

Fits the following BMW's:
1999-2006 E46 BMW Non-M RWD
2002-2008 Z4 BMW Non-M

AST Suspension
Part #: ACU-B1106S
Price: $2599.00 (USD) 
Direct Ship
Quantity:   
AST Suspension 5300 Series Coil Over Kit - E46 Non-M RWD, E85/6 Z4 Non-M

Looking for a rugged, race-proven coil over kit that screams quality? Then look no further than AST Suspension's 5000 series coil over kits. 

For starters, all 3 of their 5000 series coilovers (the 5001, 5002, and 5003 series) utilize a race proven inverted shock absorber design which produces an extremely strong damper that provides better suspension geometry under heavy lateral and braking loads as scene in road and track conditions.

Second, is the use of a monotube internal design. The separation of the oil and nitrogen gas by a floating piston allows for the use of a larger shock piston, increasing the damper performance and sensitivity. This adds more grip at the wheels which means more control and feedback from your vehicle.

Third is Adjustment. The 5300 series offers 3-way adjustability with multiple compression adjustability and rebound adjustability. The compression adjustment has been improved to now include both high-speed and low-speed compression rates. High-speed has 12 different positions of control and low-speed has 14 positions to select from, both of these adjusters working independently from the remote reservoir. The rebound adjustment features 12 positions of adjustment and is controlled by a knob located on top of the shock. This allows for quick and extremely precise set up of your suspension, enabling you to dial in every aspect of control to keep the tires planted firmly and keep as much traction as possible. Thanks to the ultimate level of control and high quality, these are best used by racing teams who are looking to get the best coil-over kit possible at a comparably low cost versus other competitors and the included features.

The external remote-reservoir, included in all 5200 series and 5300 series coil over kits, helps in a few key ways as well. The main benefit is heat reduction. With the expanded oil capacity, the oil is less likely to build up heat-soak that will decrease the effectiveness of the oil to help reduce suspension travel. The body of the shock is also enable to use an even stronger monotube design and separate the oil and the nitrogen gas with a floating piston. The floating piston eliminates potential  oil foaming, where the oil foams up when mixed with the nitrogen, which causes increase shock fade. Finally, shock travel is increased significantly now that the gases and additional oil are stored in a separate location.

The 5300 Series shock absorbers are championship winning shock absorbers and are worldwide renowned for their performance at every level.

Coilover Kit Specifications:

  • Average lowering from 0.80" to 2.80" front and rear
  • 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.
  • Fully serviceable and rebuildable.
  • Revalvable for specific characteristics.

Fits the following BMW's:
1999-2006 E46 BMW Non-M RWD
2002-2008 E85/6 BMW Z4 Non-M

AST Suspension
Part #: RAC-B1101S
Price: $5099.00 (USD) 
Direct Ship
Quantity:   
AST Suspension 5200 Series Coil Over Kit - BMW E46 M3

Looking for a rugged, race-proven coil over kit that screams quality? Then look no further than AST Suspension's 5000 series coil over kits. 

For starters, all 3 of their 5000 series coilovers (the 5001, 5002, and 5003 series) utilize a race proven inverted shock absorber design which produces an extremely strong damper that provides better suspension geometry under heavy lateral and braking loads as scene in road and track conditions.

Second, is the use of a monotube internal design. The separation of the oil and nitrogen gas by a floating piston allows for the use of a larger shock piston, increasing the damper performance and sensitivity. This adds more grip at the wheels which means more control and feedback from your vehicle.

Third is Adjustment. The 5200 series offers 2-way adjustability with compression and rebound adjustment. Both of these are easily adjusted with knobs located on top of the shock and on top of an expansion reservoir. This allows for quick and easy set up whether you are dialing in your suspension on a permanent racing vehicle or plan to track it then head back out on the road afterward. Thanks to the greater level of control, these can be used for dedicated racing needs and have been a favorite for many race team, receiving praise for its exceptionally high quality and performance capabilities compared to other racing coil over kits at a similar price point.

The external remote-reservoir, included in all 5200 series and 5300 series coil over kits, helps in a few key ways as well. The main benefit is heat reduction. With the expanded oil capacity, the oil is less likely to build up heat-soak that will decrease the effectiveness of the oil to help reduce suspension travel. The body of the shock is also enable to use an even stronger monotube design and separate the oil and the nitrogen gas with a floating piston. The floating piston eliminates potential  oil foaming, where the oil foams up when mixed with the nitrogen, which causes increase shock fade. Finally, shock travel is increased significantly now that the gases and additional oil are stored in a separate location.

Coilover Kit Specifications:

  • Average lowering from 0.80" to 2.80" front and rear
  • 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, heat dissipation and increased 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 manoeuvres.
  • Aluminum cylinder, threaded body shocks, factory mounting style.
  • New low friction seal on all AST dampings.
  • 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.
  • Fully service and rebuildable.
  • Revalvable for specific characteristics.

Fits the following BMW's:
2001-2006 E46 BMW M3

AST Suspension
Part #: RIV-B1103S
Price: $4499.00 (USD) 
Direct Ship
Quantity:   
AST Suspension 5200 Series Coil Over Kit - - E46 Non-M RWD, E85/6 Z4 Non-M

Looking for a rugged, race-proven coil over kit that screams quality? Then look no further than AST Suspension's 5000 series coil over kits. 

For starters, all 3 of their 5000 series coilovers (the 5001, 5002, and 5003 series) utilize a race proven inverted shock absorber design which produces an extremely strong damper that provides better suspension geometry under heavy lateral and braking loads as scene in road and track conditions.

Second, is the use of a monotube internal design. The separation of the oil and nitrogen gas by a floating piston allows for the use of a larger shock piston, increasing the damper performance and sensitivity. This adds more grip at the wheels which means more control and feedback from your vehicle.

Third is Adjustment. The 5200 series offers 2-way adjustability with compression and rebound adjustment. Both of these are easily adjusted with knobs located on top of the shock and on top of an expansion reservoir. This allows for quick and easy set up whether you are dialing in your suspension on a permanent racing vehicle or plan to track it then head back out on the road afterward. Thanks to the greater level of control, these can be used for dedicated racing needs and have been a favorite for many race team, receiving praise for its exceptionally high quality and performance capabilities compared to other racing coil over kits at a similar price point.

The external remote-reservoir, included in all 5200 series and 5300 series coil over kits, helps in a few key ways as well. The main benefit is heat reduction. With the expanded oil capacity, the oil is less likely to build up heat-soak that will decrease the effectiveness of the oil to help reduce suspension travel. The body of the shock is also enable to use an even stronger monotube design and separate the oil and the nitrogen gas with a floating piston. The floating piston eliminates potential  oil foaming, where the oil foams up when mixed with the nitrogen, which causes increase shock fade. Finally, shock travel is increased significantly now that the gases and additional oil are stored in a separate location.

Coilover Kit Specifications:

  • Average lowering from 0.80" to 2.80" front and rear
  • 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, heat dissipation and increased 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 manoeuvres.
  • Aluminum cylinder, threaded body shocks, factory mounting style.
  • New low friction seal on all AST dampings.
  • 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.
  • Fully service and rebuildable.
  • Revalvable for specific characteristics.

Fits the following BMW's:
1999-2006 E46 BMW Non-M RWD
2002-2008 E85/6 BMW Z4 Non-M

AST Suspension
Part #: RIV-B1101S
Price: $4499.00 (USD) 
Direct Ship
Quantity:   
AST Suspension 5100 Series Coilover Kit - E46 Non-M RWD, E85/6 Z4 Non-M

Looking for a rugged, track ready coilover kit that screams quality? Then look no further than AST Suspension's 5000 series coil over kits. 

For starters, all 3 of their 5000 series coilovers (the 5001, 5002, and 5003 series) utilize a race proven inverted shock absorber design which produces an extremely strong damper that provides better suspension geometry under heavy lateral and braking loads as scene in road and track conditions.

Second, is the use of a monotube internal design. The separation of the oil and nitrogen gas by a floating piston allows for the use of a larger shock piston, increasing the damper performance and sensitivity. This adds more grip at the wheels which means more control and feedback from your vehicle.

Third is Adjustment. The 5100 series offers up to 12 different setting for rebound adjustment. Rebound controls the rate of extension of your shock absorber and with slight changes, can directly change the characteristics of the suspension and vehicle handling.

Coilover Kit Specifications:

  • Average lowering from 0.80" to 2.80" front and rear
  • 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.​
  • Rebuildable.

Fits the following BMW's:
1999-2006 E46 BMW Non-M RWD
2002-2008 E85/6 BMW Z4 Non-M

AST Suspension
Part #: ACU-B1101S
Price: $2399.00 (USD) 
Direct Ship
Quantity:   
AST Suspension 5300 Series Coil Over Kit - BMW E46 M3

Looking for a rugged, race-proven coil over kit that screams quality? Then look no further than AST Suspension's 5000 series coil over kits. 

For starters, all 3 of their 5000 series coilovers (the 5001, 5002, and 5003 series) utilize a race proven inverted shock absorber design which produces an extremely strong damper that provides better suspension geometry under heavy lateral and braking loads as scene in road and track conditions.

Second, is the use of a monotube internal design. The separation of the oil and nitrogen gas by a floating piston allows for the use of a larger shock piston, increasing the damper performance and sensitivity. This adds more grip at the wheels which means more control and feedback from your vehicle.

Third is Adjustment. The 5300 series offers 3-way adjustability with multiple compression adjustability and rebound adjustability. The compression adjustment has been improved to now include both high-speed and low-speed compression rates. High-speed has 12 different positions of control and low-speed has 14 positions to select from, both of these adjusters working independently from the remote reservoir. The rebound adjustment features 12 positions of adjustment and is controlled by a knob located on top of the shock. This allows for quick and extremely precise set up of your suspension, enabling you to dial in every aspect of control to keep the tires planted firmly and keep as much traction as possible. Thanks to the ultimate level of control and high quality, these are best used by racing teams who are looking to get the best coil-over kit possible at a comparably low cost versus other competitors and the included features.

The external remote-reservoir, included in all 5200 series and 5300 series coil over kits, helps in a few key ways as well. The main benefit is heat reduction. With the expanded oil capacity, the oil is less likely to build up heat-soak that will decrease the effectiveness of the oil to help reduce suspension travel. The body of the shock is also enable to use an even stronger monotube design and separate the oil and the nitrogen gas with a floating piston. The floating piston eliminates potential  oil foaming, where the oil foams up when mixed with the nitrogen, which causes increase shock fade. Finally, shock travel is increased significantly now that the gases and additional oil are stored in a separate location.

The 5300 Series shock absorbers are championship winning shock absorbers and are worldwide renowned for their performance at every level.

Coilover Kit Specifications:

  • Average lowering from 0.80" to 2.80" front and rear
  • 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.
  • Fully serviceable and rebuildable.
  • Revalvable for specific characteristics.

Fits the following BMW's:
2001-2006 E46 BMW M3

AST Suspension
Part #: RAC-B1103S
Price: $5099.00 (USD) 
Direct Ship
Quantity:   
AST Suspension 5100 Series Coilover Kit - E46 M3

Looking for a rugged, track ready coilover kit that screams quality? Then look no further than AST Suspension's 5000 series coil over kits. 

For starters, all 3 of their 5000 series coilovers (the 5001, 5002, and 5003 series) utilize a race proven inverted shock absorber design which produces an extremely strong damper that provides better suspension geometry under heavy lateral and braking loads as scene in road and track conditions.

Second, is the use of a monotube internal design. The separation of the oil and nitrogen gas by a floating piston allows for the use of a larger shock piston, increasing the damper performance and sensitivity. This adds more grip at the wheels which means more control and feedback from your vehicle.

Third is Adjustment. The 5100 series offers up to 12 different setting for rebound adjustment. Rebound controls the rate of extension of your shock absorber and with slight changes, can directly change the characteristics of the suspension and vehicle handling.

Coilover Kit Specifications:

  • Average lowering from 0.80" to 2.80" front and rear
  • 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.​
  • Rebuildable.

Fits the following BMW's:
2001-2006 E46 BMW M3

AST Suspension
Part #: ACU-B1103S
Price: $2399.00 (USD) 
Direct Ship
Quantity:   
AST Suspension 2000 Series Coilover Kit - E46 Non-M RWD

Looking for high quality entry level coilovers that will both lower your car and give you an added amount of handling performance? The AST Suspension 2000 Series Coilovers are the perfect option. 

These coilover are perfectly sect up for tuners and show cars but also gives you some impressive handling performance with their twin tube, fixed dampening design. With a minimum lowering amount of .8" and range up to 2.8" front and rear (most models), you can have your car lowered just the way you want.

The springs included in this set are chosen by AST to ensure a ride that is not too hard, even for coilovers, and not too sloppy. These springs also fit with any stock mount used on the car or any aftermarket camber plate (not included) for stock springs.

The 2000 series offers:

  • Twin-tube system
  • Lowering from minimal 30mm up to 60mm
  • Formed springs for most applications
  • 2 years warranty
  • Average lowering from 0.80" to 2.80" front and rear

Fits the following BMW's:
1999-2006 E46 BMW Non-M RWD

AST Suspension
Part #: FCS-B1101S
Price: $1299.00 (USD) 
Direct Ship
Quantity:   
AST Suspension 5100 Series Coilover Kit - E46 M3

Looking for a rugged, track ready coilover kit that screams quality? Then look no further than AST Suspension's 5000 series coil over kits. 

For starters, all 3 of their 5000 series coilovers (the 5001, 5002, and 5003 series) utilize a race proven inverted shock absorber design which produces an extremely strong damper that provides better suspension geometry under heavy lateral and braking loads as scene in road and track conditions.

Second, is the use of a monotube internal design. The separation of the oil and nitrogen gas by a floating piston allows for the use of a larger shock piston, increasing the damper performance and sensitivity. This adds more grip at the wheels which means more control and feedback from your vehicle.

Third is Adjustment. The 5100 series offers up to 12 different setting for rebound adjustment. Rebound controls the rate of extension of your shock absorber and with slight changes, can directly change the characteristics of the suspension and vehicle handling.

Coilover Kit Specifications:

  • Average lowering from 0.80" to 2.80" front and rear
  • 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.​
  • Rebuildable.

*This suspension system is a true coilover system and will eliminate the rear barrel springs

Fits the following BMW's:
2001-2006 E46 BMW M3

AST Suspension
Part #: ACU-B1107SCO
Price: $2449.00 (USD) 
Direct Ship
Quantity:   
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