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Description

AST Multipoint Weld-in Roll Cage BMW E81 V3 NASCAR door

The AST Multipoint Weld-in Roll Cage BMW E81 V3 NASCAR Door Bars is a full roll cage for the BMW 1 Series E81 with three-door hatchback bodywork. This multipoint E81 V3 NASCAR has ten welded mounting points on the bodyshell and uses several curved tubes in the doors instead of the standard door bar.

The cage is designed and built by AST Roll Cages in Spain, for drifters who want to protect the sides of their E81 as well as possible without going straight to the heaviest specification.

Key benefits

• Ten welded mounting points: two more attachment points than a standard weld-in cage, for wider load distribution.
• NASCAR door bars: curved tubes in each door, where the standard V3 has a straight door bar.
• More room to get in: thanks to the outward curve of the tubes, the door opening remains easy to use.
• Full V3 layout: the structure continues right to the front, with reinforcement bars to the bulkhead.
• E355 steel: main hoop with a diameter of 45 mm, the remaining tubes 40 mm.
• Gussets and reinforcement plates: supplied to support every welded mounting point.
• Unpainted weld-in kit: weld and paint in a single operation.

Suitable for

BMW 1 Series E81, three-door hatchback

• BMW 1 Series E81 three-door hatchback, model years 2007 to 2011
• Type: full roll cage, version V3 with NASCAR door bars, multipoint weld-in (permanent)
• Drifting, track use and rallying
• Only for the three-door E81. AST designs a dedicated cage for each body style; the versions for the E82 coupé and the E87 five-door are not interchangeable with this one.

Technical specifications

• Manufacturer: AST Roll Cages
• Manufacturer part number: CMBN03610
• 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), with NASCAR door bars
• 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
• Weight: 71 kg (manufacturer’s figure)
• Finish: unpainted weld-in kit
• Included: weld-in kit, gussets, 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. The combination of ten welded mounting points and curved door tubes calls for careful test-fitting, so leave the fitting to a workshop that installs cages regularly. AST digitises the bodyshell with laser scanners and designs the cage in 3D, so that it fits your car exactly.

Ten welded mounting points plus curved door tubes: a cage that spreads the forces widely and protects the sides well.

Why choose this multipoint E81 V3 NASCAR?

In drifting, side contact is the most common cause of damage, and that is exactly what this version is designed for. You get the complete V3 structure, ten attachment points in the bodyshell and curved tubes that cover the door opening better than a single straight bar. The cage is intended for track and competition use; always check the regulations of your own organiser before you enter.

Frequently asked questions

What is the difference from the standard V3?

The multipoint E81 V3 NASCAR has ten welded mounting points instead of eight and uses several curved tubes per door instead of the straight door bar. This provides more side protection and more room to get in.

How is the fit guaranteed?

AST scans the bodyshell of the three-door E81 with laser scanners and designs the cage in 3D on that basis. That is why it fits precisely, but also why it fits only this body style.

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.