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Description

BMW E90/E92 3 Series Sedan/Coupe RWD (05-11) BC Racing DS coilover kit 5.5/8 kg/mm

The BC Racing DS coilover kit E90 E92 (part number I-03-DS-DA) is a coilover kit adjustable in height and damping, also simply called a coilover, for the BMW 3 Series E90 Sedan and E92 Coupe with rear-wheel drive, excluding the M3, model years 2005 to 2011. The spring rate is 5.5 kg/mm front and 8 kg/mm rear.

The DS series is the track-focused coilover kit from BC Racing, for an E90 or E92 that regularly goes on track and is also simply driven on the road. At the heart of the kit is a monotube damper with a digressive piston in a satin chrome damper body.

The digressive piston damps more firmly during slow body movements, between 0 and 50 mm/s. As a result, the 3 Series stays calmer on turn-in and under braking, while the springs, at 5.5 kg/mm front and 8 kg/mm rear, are the same as those of the BR kit for this car.

Key benefits

• Digressive piston: firmer damping during slow body movements between 0 and 50 mm/s.
• 30-click damping adjustment: compression and rebound adjustable together, per damper.
• Pillowball top mounts at the front: or camber plates, for a direct connection of the front struts.
• Ride height independent of spring preload: you change the height without changing the spring preload.
• Spring rate 5.5/8 kg/mm: the same springs as the BR kit for the E90 and E92.
• Concave lower lock ring: holds the set height.
• Satin chrome damper body: the recognisable look of the DS series.
• Rebuildable: the dampers can be rebuilt.

Suitable for

BMW 3 Series E90 Sedan (2005 to 2011) and E92 Coupe (2006 to 2011) with rear-wheel drive; not for the M3 and not for the xDrive (xi) with four-wheel drive. For the E91 Touring and E93 Convertible, BC Racing has separate kits (I-17).

• Regular track days and circuit days
• Sporty road use with more steering feel
• Drivers who want a direct connection at the front

Technical specifications

• Manufacturer: BC Racing
• Part number: I-03-DS-DA
• Series: DS, track-focused
• Spring rate front/rear: 5.5/8 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 use is not covered by the warranty

Fitting and delivery

This vehicle-specific kit replaces the original dampers and springs front and rear. We recommend having it fitted by an experienced mechanic. On some cars the pillowball top mount at the front requires a small modification to the upper mounting; if in doubt, contact us. After adjusting the ride height, schedule a wheel alignment, especially if you use the camber plates. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If the kit is temporarily sold out at BC Racing, you can still order and we will keep you informed of the delivery date.

The BC Racing I-03-DS-DA is the track-focused DS coilover kit for the BMW E90 Sedan and E92 Coupe with rear-wheel drive, with a digressive monotube damper and 5.5/8 kg/mm springs.

Why choose this DS coilover kit E90 E92?

If you take your 3 Series on track more often, you benefit from a damper that keeps the body extra well in check during slow movements. The digressive piston of the DS does exactly that, while the 30 clicks give you the room to set up the E90 or E92 a little more softly for the road. The concave lock ring and the rebuildable dampers make the kit suitable for years of intensive use.

BC Racing coilover kits for the BMW E90 Sedan and E92 Coupe

Overview of the BC Racing series for the BMW E90 Sedan and E92 Coupe supplied by Race4DriftParts, with the BC Racing part number. Spring rates in kg/mm, front/rear.

For the BMW E91 Touring and E93 Convertible, BC Racing has separate kits. Their part numbers start with I-17.

Frequently asked questions

What is the difference between the BC Racing DS and BR coilover kit for the BMW E90 and E92?

The difference is in the piston: the DS has a digressive piston, the BR a linear one. As a result, the DS damps more firmly during slow body movements and is more track-focused, while the BR is the all-rounder for the road. Springs (5.5/8 kg/mm) and the number of clicks (30) are the same on both.

Is the BC Racing DS coilover kit suitable for every BMW E90 and E92?

No, not for every version. The kit fits the E90 Sedan and E92 Coupe with rear-wheel drive, but not the M3 and not the xDrive (xi) with four-wheel drive. For the E91 Touring and E93 Convertible, BC Racing has its own kits (I-17).

Is noise from the BC Racing DS coilover kit for the E90 and E92 covered by the warranty?

No. The DS is a track-focused series, and noise from track use is not covered by the warranty. BC Racing gives a 1 year warranty on manufacturing defects.

How quickly is the BC Racing DS coilover kit for the BMW E90 and E92 delivered?

Within 1 to 2 weeks as long as the manufacturer has stock. If BC Racing temporarily does not have the DS coilover kit E90 E92 in stock, you can still order and we will tell you the expected delivery date.

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.