I-121-HM - BC Racing HM Series Coilover Suspension Kit - E46 M3 Convertible
BC Racing HM Series Coilover Suspension Kit - E46 M3 Convertible
For the E46 M3 Convertible owner who demands uncompromised geometry control, the BC Racing HM Series offers a motorsport-first engineering solution. By utilizing an inverted strut layout with a much larger internal piston shaft, the HM Series excels in maintaining wheel alignment during extreme lateral cornering—a critical factor for the MacPherson strut-equipped M3. The addition of external reservoirs ensures the damping fluid remains cool, preserving valving accuracy lap after lap. Standard front pillowball camber plates eliminate factory rubber "mush," providing direct and unmediated steering feedback. Because convertibles often require higher roll stiffness to compensate for chassis flex, the HM Series’ 12kg rear spring rate provides the stability needed to keep the car planted and responsive.
Key Features:
Enhanced Side-Load Resistance: The inverted design handles high lateral loads longer than traditional upright dampers without fatigue.
Reduced Damper Fade: External canisters move fluid away from brake heat to maintain consistent lap times.
Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for surgical alignment and increased turn-in bite.
Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked even under track conditions.
Fully Rebuildable: All components are individual and replaceable, ensuring the long-term serviceability of the system.
Specifications:
Vehicle Fitment: 2000–2006 BMW M3 Convertible (E46 Chassis).
Spring Rates (Standard): Front: 8 kg/mm | Rear: 12 kg/mm (Swift Springs).
Hardware: Black chrome-plated steel shock bodies and 6061-T6 aluminum components.
Adjustment Type: Independent ride height, spring preload, and 2-way damping.
Warranty: 1-Year limited manufacturer's warranty.
BC Racing HM Series Coilover Suspension Kit - E46 M3 Convertible
$2565.00
Product Details
For the E46 M3 Convertible owner who demands uncompromised geometry control, the BC Racing HM Series offers a motorsport-first engineering solution. By utilizing an inverted strut layout with a much larger internal piston shaft, the HM Series excels in maintaining wheel alignment during extreme lateral cornering—a critical factor for the MacPherson strut-equipped M3. The addition of external reservoirs ensures the damping fluid remains cool, preserving valving accuracy lap after lap. Standard front pillowball camber plates eliminate factory rubber "mush," providing direct and unmediated steering feedback. Because convertibles often require higher roll stiffness to compensate for chassis flex, the HM Series’ 12kg rear spring rate provides the stability needed to keep the car planted and responsive.
Key Features:
Enhanced Side-Load Resistance: The inverted design handles high lateral loads longer than traditional upright dampers without fatigue.
Reduced Damper Fade: External canisters move fluid away from brake heat to maintain consistent lap times.
Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for surgical alignment and increased turn-in bite.
Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked even under track conditions.
Fully Rebuildable: All components are individual and replaceable, ensuring the long-term serviceability of the system.
Specifications:
Vehicle Fitment: 2000–2006 BMW M3 Convertible (E46 Chassis).
Hardware: Black chrome-plated steel shock bodies and 6061-T6 aluminum components.
Adjustment Type: Independent ride height, spring preload, and 2-way damping.
Warranty: 1-Year limited manufacturer's warranty.
Prop 65 Warning
Product Q&A
Lifetime Replacement
This product is not eligible for Lifetime Replacement
Fits These Cars
MAKE
MODEL
SUBMODEL
ENGINE
Special Fitment Notes
BMW
E46
M3
S54 3.2L
Use vehicle selector to confirm fitment
*The above product applications have been written by Turner Motorsport. All
warranties, product application, fitment, and performance are the responsibility of Turner Motorsport.
For additional information see the terms of use.
Prop 65 Warning
