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Description

AST Half Roll Cage BMW E21 Coupé V1

The AST Half Roll Cage BMW E21 Coupé V1 is a half roll cage for the BMW 3 Series E21 with 2-door coupé bodywork. This Half roll cage E21 Coupé V1 protects the rear compartment of the car and leaves the front part of the interior untouched, which makes it suitable for an E21 that is still driven on the road as well.

The cage is designed and built by AST Roll Cages in Spain, for drivers who want a more rigid rear section and a solid attachment point without the full set of bars of a complete roll cage.

Key benefits

• Half roll cage that covers only the rear compartment; the front seats remain unobstructed.
• Four bolting points on four foot plates made of 3 mm steel, welded to the bodyshell.
• Fixed mounting: this version is not removable and has no connecting sleeves.
• E355 steel: main hoop with a diameter of 45 mm, the rest of the structure 40 mm.
• More rigid rear section for the compact classic, making its behaviour calmer under hard braking and on turn-in.
• Fit from a laser scan of the E21 bodyshell, with a 3D design for each car.
• Complete package with reinforcement plates, bolts, washers, nuts, documentation, fitting instructions and sticker set.

Suitable for

BMW 3 Series E21, 2-door Coupé

• BMW 3 Series E21 (1975 to 1983), 2-door Coupé
• Type: half roll cage, version V1, fixed mounting
• Drifting, track use and rallying

Technical specifications

• Manufacturer: AST Roll Cages
• Manufacturer part number: CMBN06853
• Sunroof: for roofs without a sunroof
• Headlining: for roofs without headlining
• Rear anchorage: at the wheel arch
• Rear structure layout: X design
• Type: half roll cage, fixed mounting, not removable
• Main hoop: E355 steel, 45 mm diameter
• Secondary structure: E355 steel, 40 mm diameter
• Foot plates: 3 mm steel, custom-designed for each car
• Mounting: 4 bolting points on 4 foot plates welded to the bodyshell
• Coverage: rear compartment of the car only
• Weight: 210 kg (manufacturer’s figure)
• Finish: welded and unpainted
• Included: welded structure, reinforcement plates, bolts, washers, nuts, documentation, fitting instructions and sticker set (without connecting sleeves)

Fitting and delivery

The cage is built to order; standard delivery time is 15 to 35 working days. The four base plates are welded to the bodyshell and the structure is then bolted onto them, so allow for welding during preparation. AST digitises the bodyshell with laser scanners and designs the cage in 3D, so that it fits your car exactly. This cage is intended for track and competition use; check the regulations of your own motorsport body beforehand.

A half roll cage keeps the front of the E21 usable while still giving the rear section the rigidity of a competition car.

Why choose this Half Roll Cage E21 Coupé V1?

Not every E21 needs to become a stripped-out racer. This version tackles the rear compartment – precisely the part of the body where a compact two-door starts to flex first – and leaves the front of the interior intact. Because the cage is fixed in place, there is no play in the joints, which benefits rigidity.

Frequently asked questions

Can I remove this cage later?

No. This version is fixed in place and has no connecting sleeves. If you want a version that can be taken out, have a look at the removable half cage for the E21 Coupé.

Is this cage FIA-approved?

AST does not list a homologation number for this item. The cage is intended for track and competition use; check with your own motorsport body which requirements apply in your class.

What exactly will I receive?

You receive the welded structure, the reinforcement plates, all bolts, washers and nuts, the documentation, the fitting instructions and a sticker set. The cage comes unpainted, so you decide on the finish yourself.

What is the delivery time?

The standard delivery time for this roll cage is 15 to 35 working days.

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.