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Description

AST Bolt-in Roll Cage BMW E30 Sedan V4

The AST Bolt-in Roll Cage BMW E30 Saloon V4 is a full roll cage for the BMW 3 Series (E30) with 4-door saloon bodywork. This Bolt-in E30 Saloon V4 has front bars, door bars, an extra diagonal brace and a harness bar, and is designed for the rear-wheel drive E30.

The cage is designed and built by AST Roll Cages in Spain, for drivers who compete and want a structure that fully supports both the bodyshell and the harness system.

Key benefits

• Harness bar: your four-point or six-point harnesses are attached to the cage rather than to the bodyshell, which keeps the angle of the shoulder straps correct.
• Extra diagonal brace: the main hoop is triangulated and holds its shape better in a rollover.
• Door bars and front bars: everything the V3 offers is already included here, supplemented by the extra bars.
• Six bolting points: bolted onto six foot plates in 3 mm steel that are welded to the bodyshell.
• E355 tubes: 45 mm main hoop, 40 mm for the rest of the structure.
• Rear-wheel drive only: the structure follows the floor and tunnel of the rear-wheel drive E30.
• Complete and unpainted: including connecting sleeves, reinforcement plates, bolts, washers, nuts, documentation, fitting instructions and a sticker set.

Suitable for

BMW E30 3 Series, 4-door saloon

• BMW E30 3 Series 4-door Saloon
• Rear-wheel-drive E30 only; a separate AWD version is available for the all-wheel-drive 325iX
• Type: bolt-in roll cage, version V4
• Drifting, track use and rallying

Technical specifications

• Manufacturer: AST Roll Cages
• Manufacturer part number: CMBN05306
• Sunroof: for roofs without a sunroof
• Headlining: for roofs without headlining
• Rear anchorage: in the rear suspension area
• Rear structure layout: V design
• Type: full roll cage, bolt-in on welded foot plates
• 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: 6 bolting points on 6 foot plates welded to the bodyshell
• Weight: 210 kg (manufacturer’s figure)
• Finish: welded and unpainted, split into sections via connecting sleeves
• Included: welded structure, connecting sleeves, reinforcement plates, bolts, washers and nuts, documentation, fitting instructions and sticker set

Fitting and delivery

The cage is built to order; the standard delivery time is 15 to 35 working days. Before fitting, determine the seating position of your bucket seat, as the harness bar has to sit at the correct height behind your shoulders. The six foot plates are welded to the bodyshell and the cage is then bolted onto them, so welding is part of the fitting.

The V4 leaves nothing loose in the car: bodyshell, cage and harness system form a single unit.

Why choose this Bolt-in E30 Saloon V4 roll cage?

A harness is never stronger than the point it is anchored to. By attaching the shoulder straps to a harness bar that is part of the cage, the angle stays correct and, in an impact, the load does not pull on the thin sheet metal behind the seat. The extra diagonal also keeps the main hoop dimensionally stable. AST digitises the bodyshell with laser scanners and designs the cage in 3D, so that every bar ends up in the right place.

Frequently asked questions

What is the harness bar for?

The harness bar is the mounting point for the shoulder straps of your harness. On the Bolt-in E30 Saloon V4, your harness is therefore attached to the cage rather than to the parcel shelf, which gives much better load absorption.

Is this the most comprehensive version?

Within this bolt-in range for the E30 saloon, the V4 is the highest specification we stock: front bars, door bars, extra diagonal and harness bar are all included.

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.