D2 Racing Circuit coilover kit for BMW M3 E30 51mm struts

Specifications of D2 Coilovers Circuit

D2 Racing has been able to improve over the years and therefore have a great deal of experience in competition. They thus put their experience at the service of their customers by offering them suspensions specifically designed for circuit use. Thanks to their higher oil capacity and their large piston diameter (44 mm), these shock absorbers will guarantee you flawless endurance, including on long track sessions and endurance races. their wide adjustment and adaptation possibilities make it possible, for example, to adjust the height independently of the spring preload, which ensures efficient damping in all circumstances, up to the lowest lowering levels. Camber is also adjustable at the front via the shock absorber cup (valid for McPherson type struts only).

The coilovers from D2 Racing are of monotube oil design and they offer a lowering range of up to 10 to 12 centimeters depending on the model. The damping (also called "hardness") is adjustable in 36 positions. Its shock absorber body is made of aluminum, which provides them with foolproof anti-corrosion protection. In most cases, these aluminum shock absorbers are less heavy than the original, and therefore also save a few precious kilograms, weight being the sinews of war in the race!

Characteristics and technical information:

• Affected vehicle (s): BMW M3 E30 with 51mm diameter struts
• Type of front cups: P or PP as an option (caster and camber adjustable on the cup at the front)
• Type of rear cups: P
• Front spring stiffness: 12 kgF / mm
• Rear spring stiffness: 10.5 kgF / mm
• The photo shown for this kit is a generic photo. The actual kit may have design differences depending on your vehicle. 

Average delivery times are 5 to 10 working days for mainland France. All D2 products are TÜV and ISO-9001 certified, and benefit from a one-year manufacturer's warranty. To meet specific needs, it is possible to obtain tailor-made springs for all kits. D2 Racing keeps a wide range of spare parts in stock, for the maintenance and repair of your suspensions without delay.

Legend: types of cups

The diagram in photo 2 shows you the difference between the separate springs (identical configuration to the origin), and the combined springs (spring around the shock absorber) for E36 and E30. On the E30 version, the strut must be welded at the front: it is a complex job that must be carried out knowingly and with responsibility. STR Performance can perform this installation for you, contact us for more information.

We also specify that your struts must come to us completely disassembled (please remove all the removable parts: springs, flanges, bearings, etc.).
As an example, here is a photo of the struts from a BMW E30 as they should reach us:

We reserve the right to charge a dismantling package if necessary.