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Description

BMW E46 M3 Convertible (00-06) BC Racing DS coilover kit 6/9 kg/mm

The BC Racing DS coilover kit E46 M3 Convertible (part number I-121-DS-DA) is a coilover kit adjustable in height and damping, also simply called a coilover, for the BMW E46 M3 Convertible, model years 2000 to 2006. The spring rate is 6 kg/mm front and 9 kg/mm rear.

It is the track-focused BC Racing kit for the open-top M3. The DS shares its base with the BR, but uses a digressive piston that damps extra firmly at low speeds, from 0 to 50 mm/s.

You notice this mainly during weight transfer: less dive under braking, less roll in corners. At fast wheel movements the damper actually allows more, so that the tyres keep contact over bumps. The spring rate is 6/9 kg/mm and you adjust the damping in 30 clicks.

You set the ride height via the damper body, independently of the spring preload. The satin chrome damper body and the concave lower lock ring are part of the DS version.

Key benefits

• Digressive piston: firm at slow body movements.
• Less roll and dive: a calmer M3 Convertible when driven hard.
• Dedicated Convertible part number: specific to the open-top M3.
• 30 clicks: compression and rebound adjustable together.
• Ride height independent of spring preload: low without losing damper stroke.
• Satin chrome damper body: the typical DS finish.
• Spring rate 6/9 kg/mm: front/rear.
• Rebuildable: for long-term use.

Suitable for

BMW M3 E46 Convertible, model years 2000 to 2006

• Track days and circuit training sessions
• Sporty driving on winding roads
• M3 Convertible drivers looking for more chassis control than an all-round kit offers

Technical specifications

• Manufacturer: BC Racing
• Part number: I-121-DS-DA
• Series: DS, digressive, track-focused
• Spring rate front/rear: 6/9 kg/mm
• Damper design: monotube with digressive piston, satin chrome damper body
• Damping: 30 clicks, compression and rebound simultaneously
• Ride height: adjustable via the damper body, independent of the spring preload
• Top mounts: pillowball top mounts or camber plates at the front, rubber or original mounting at the rear
• Contents: dampers and springs front and rear, lower mounts, top mounts where applicable, adjustment spanners and warranty card with serial number
• Warranty: 1 year on manufacturing defects. Noise from track-focused series is not covered by the warranty

Fitting and delivery

The DS replaces the original suspension of the M3 Convertible, front and rear. After fitting, you set the height and have a wheel alignment done, because a lower stance changes camber and toe. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If the kit is temporarily unavailable from the manufacturer, you can still order and we will keep you informed.

An open-top M3 should also go through corners tightly: the digressive DS keeps the body calm without locking up the wheels.

Why choose this DS coilover kit E46 M3 Convertible?

Because it lets you take the step from an all-round suspension to a kit that belongs on the circuit, without the complexity of reservoirs. For an M3 Convertible that is regularly driven hard, the digressive DS is a clear improvement over the original suspension.

BC Racing coilover kits for the BMW E46 M3 Convertible

Overview of the BC Racing series for the BMW E46 M3 Convertible supplied by Race4DriftParts, with the BC Racing part number. Spring rates in kg/mm, front/rear.

Frequently asked questions

What is the difference between the BC Racing DS and BR for the E46 M3 Convertible?

The DS coilover kit E46 M3 Convertible has a digressive piston, so it damps more firmly at slow movements and is more track-focused. The BR uses a linear piston and is the all-rounder.

Is the BC Racing DS coilover kit for the E46 M3 Convertible comfortable on the road?

Yes, within limits: with 30 clicks you set the damping softer for road use, although the DS remains track-focused. If you mainly drive on the road, the BR is a more pleasant alternative.

What is the delivery time of this BC Racing DS coilover kit?

The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If there is no stock, you can still order and we will let you know when the kit arrives.

Delivery outside the European Union: different shipping costs may apply. Don’t worry: we will email you as soon as possible after your order and agree the shipping with you. You are not committed to anything without your consent.