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AST Suspension

SKU: ACU-B1101S

AST Suspension 5100 Series Coilovers (Excludes Front/Rear Top Mounts) - 2000-2005 BMW 3 Series 325i Sedan/Touring/Coupe/Convertible (E46)

$3,449.00
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Fitment confirmation is based on the vehicle's year, make, and model only. Please verify fitment by reviewing full product description which may include notes and more specific information.

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The 5100 Series shock absorbers for the 2000-2005 BMW 3 Series 325i Sedan/Touring/Coupe/Convertible (E46) 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.
  • Part Number: ACU-B1101S
  • Product: AST 5100 Series
  • Adjustment: 1 Way
  • System: Separate Setup
  • Product Note: Non Coilover
  • Front/Rear Ratio: Front = 60% / Rear = 40%
  • Strut/Shock Type: Front: McPherson strut / Rear: Eye 2 pin strut
  • Model Years: 2000-2005
  • Make: BMW
  • Model: 3 Series
  • Chassis: E46
  • Spring Kit: Included
  • Top Mounts: Front / Rear Optional (If Available)
  • Optional 1 Front Top Mounts: TMA-B01-A2-20F - Camber adjustable
  • Optional 2 Front Top Mounts: Not Available
  • Optional Rear Top Mounts: TMA-B01-B1-30R - Solid top mounts (no camber adjustment)
  • Adjustable Front Droplinks Available? Part Number: DLA-BMW1-S
  • Adjustable Front Droplinks Required? Yes
  • 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.
  • 2000 BMW 3 Series 325i Sedan/Touring/Coupe/Convertible (E46)
  • 2001 BMW 3 Series 325i Sedan/Touring/Coupe/Convertible (E46)
  • 2002 BMW 3 Series 325i Sedan/Touring/Coupe/Convertible (E46)
  • 2003 BMW 3 Series 325i Sedan/Touring/Coupe/Convertible (E46)
  • 2004 BMW 3 Series 325i Sedan/Touring/Coupe/Convertible (E46)
  • 2005 BMW 3 Series 325i Sedan/Touring/Coupe/Convertible (E46)
Product StatusEstimated Handling Time
In Stock1 business day
Out of Stock4-6 weeks
Custom-Builds/Special Order4-6 weeks
  • All fitment data on our website is provided by the manufacturer. It is the customer's responsibility to read the entire product description and verify fitment prior to ordering and installation.
  • All coilovers are for vehicles with a 2WD drivetrain unless specified AWD.
  • Notes and descriptions regarding electronic damping (EDC, DDS, etc.) pertain to vehicle fitment. Aftermarket coilovers DO NOT interface w/ OEM electronic damping control systems unless specified.