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Description

AST Multipoint Weld-in Roll Cage BMW F82 Coupé V4 NASCAR door

The AST Multipoint Weld-in Roll Cage BMW F82 Coupé V4 with NASCAR door bars is a full roll cage for the BMW 4 Series F82 with 2-door coupé bodywork. The Multipoint F82 Coupé V4 NASCAR brings the V4 bar package with diagonal brace and harness bar, and replaces the standard door bar with several curved tubes in the door.

The cage is designed and built by AST Roll Cages in Spain, for drivers who expect plenty of side contact when drifting and, at the same time, do not want to attach their harnesses to an improvised bar.

Key benefits

• NASCAR door bars plus harness bar in one package: two upgrades that would otherwise mean calling the welder back twice.
• Curved door tubes give more side protection and more room to get in than a straight door bar.
• An extra diagonal brace limits twisting of the rear compartment under lateral loads.
• Ten welded mounting points spread the loads across the bodyshell rather than over separate foot plates.
• E355 steel, 45 mm for the main hoop and 40 mm for the rest of the structure.
• Foot plates in 3 mm steel, custom-designed for each car.
• Supplied unpainted, so you choose the finish yourself after welding.

Suitable for

BMW 4 Series F82, 2-door coupé

• BMW F82, the M4 Coupé built from 2014 to 2020
• Type: multipoint weld-in roll cage, version V4 with NASCAR door bars
• AST does not offer a Convertible version for the F82; this cage only fits the Coupé
• Its successor, the G82, has its own cage that is not interchangeable with this F82 version
• Drifting, track use and rallying

Technical specifications

• Manufacturer: AST Roll Cages
• Manufacturer part number: CMBN05913
• 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, multipoint weld-in (permanent)
• 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: 10 welded mounting points on the bodyshell
• Door bars: NASCAR, several curved tubes in the door
• Weight: 71 kg (manufacturer’s figure)
• Finish: unpainted weld-in kit
• Included: weld-in kit, gussets, reinforcement plates, mounting hardware, documentation, fitting instructions, sticker set

Fitting and delivery

The cage is built to order; the standard delivery time is 15 to 35 working days. Bear in mind that both the doors and the area behind the seats must be cleared before the welder starts, because the NASCAR tubes and the harness bar both sit where there would normally be trim. AST digitises the bodyshell with laser scanners and designs the cage in 3D, so it fits your car exactly.

This is the level at which the cage takes you seriously, both in an impact and when it comes to your harness.

Why choose this Multipoint F82 Coupé V4 NASCAR roll cage?

Most drivers who start with a V3 NASCAR end up wanting a harness bar within a season. Welding one into a cage that is already fixed in place costs more than the difference in purchase price. This version takes that step straight away and keeps the wider door protection as well. The cage is intended for track and competition use; always check the regulations of your own organiser before ordering.

Frequently asked questions

What does the V4 add compared with the V3 NASCAR?

The Multipoint F82 Coupé V4 NASCAR has the same curved door tubes as the V3 NASCAR, but adds an extra diagonal brace and a harness bar. Door protection is the same; rigidity at the rear and harness mounting are better.

Does this cage also fit a BMW G82 or a convertible?

No. This cage has been designed exclusively for the F82 Coupé. AST does not offer a convertible version for the F82, and the G82 is the successor, with its own cage that is not interchangeable.

Does this need to be done by a specialist welder?

Yes, that is advisable. You receive a weld-in kit that is welded to the bodyshell at ten points; that is a job for someone with experience of thin-walled sheet metal and roll cages.

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.