BC RACING COILOVERS DS SERIES - BMW 3 SERIES E46 98-06 (EXCL M3)

The BC Racing DS Series is built around digressive valving, offering similar benefits to the BR Series but with a stronger focus on track performance. The digressive piston design delivers a non-linear damping curve, allowing higher low-speed damping to control body roll during cornering, braking, and acceleration, while reducing high-speed damping to let the suspension travel freely over kerbs and rough sections without unsettling the chassis.

Key Features

• Digressive piston and damping curve
• Satin chrome finished damper body
• 30-way simultaneous rebound and compression adjustment
• Ride height adjustment independent of spring preload
• Camber-adjustable top mounts (vehicle dependent)
• Pillowball top mounts
• Bearing-mounted upper spring platform
• Dust boots to protect damper seals
• Tapered bottom mount locking collar to prevent loosening
• Custom spring rates available
• Spare parts available with short lead times
• 1-year manufacturer warranty

Spring Rate Options

The DS Series is designed with track performance in mind, and the available spring rates reflect this. For most applications, the Recommended spring rate provides an ideal balance between body control and mechanical grip on circuit, while still remaining manageable on the road for those who drive their car to and from events.

Higher spring rates are available for cars running slicks or semi-slicks, aero upgrades, stiffened chassis, or drivers who prefer a firmer, more responsive setup. Lower rates can be chosen for mixed-use cars where some road comfort is still required, though the DS Series naturally leans toward performance-driven setups.

If you're unsure which spring rate best suits your track layout, tyre choice, or level of modification, feel free to get in touch and we’ll help you select the right setup.

Options Available

Not all configurations apply to every vehicle.

• DS Series – Aluminium front top mounts with rubber centres; rear aluminium rubber mounts or no rear mounts.
• DA Series – Front camber-adjustable pillowball mounts; rear aluminium rubber mounts or no rear mounts.
• DN Series – No front top mounts; rear aluminium rubber mounts or no rear mounts.
• DH Series – Front camber-adjustable pillowball mounts; rear pillowball mounts or no rear mounts.