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Description

AST Multipoint Weld-in Roll Cage BMW E46 Sedan V4 NASCAR door

The AST Multipoint Weld-in Roll Cage BMW E46 Sedan V4 NASCAR Door Bars is a full roll cage for the BMW E46 with 4-door saloon bodywork. This Multipoint E46 Sedan V4 NASCAR takes the V3 level as its starting point and adds an extra diagonal brace and a harness bar. Instead of the standard door bar, the doors feature several curved tubes in NASCAR style.

The cage is designed and built by AST Roll Cages in Spain, for drivers who want to combine a proper mounting point for their harness with a rigid structure and maximum side protection.

Key benefits

• Harness bar: a fixed bar at the correct height to which the shoulder straps of your harness are attached.
• Extra diagonal: the additional diagonal brace turns the main hoop into a triangulated structure and limits deformation.
• Ten welded mounting points: the multipoint design spreads the load over ten anchorage points instead of eight.
• NASCAR door bars: several curved tubes per door absorb a side impact over a wider area than a straight bar.
• Easy access: the tubes curve out towards the door, so the door opening remains usable despite the extra tubes.
• Exact fit: AST laser-scans the E46 saloon and designs the cage in 3D based on that scan.
• Supplied complete: weld-in kit with gussets, reinforcement plates and mounting hardware.

Suitable for

BMW E46, 4-door saloon

• BMW E46 4-door saloon
• Type: multipoint weld-in roll cage, version V4 with NASCAR door bars
• Drifting, track use and rallying

Technical specifications

• Manufacturer: AST Roll Cages
• Manufacturer part number: CMBN04248
• 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 per door
• 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. Bear in mind that the harness bar helps determine where your seats and harnesses are positioned, so plan the fitting sequence accordingly. AST digitises the bodyshell with laser scanners and designs the cage in 3D, so that it fits your car exactly.

With ten welded mounting points, a harness bar and NASCAR door bars, V4 is the level at which the cage genuinely starts to support the rest of your safety equipment.

Why choose this Multipoint E46 Saloon V4 NASCAR roll cage?

A harness is only as good as the point it is anchored to, and that is where V3 and V4 differ. The harness bar gives your shoulder straps a correct, fixed mounting, and the extra diagonal keeps the whole structure in shape when forces act on it. Add ten welded mounting points and the NASCAR door bars, and you have a structure that has been thought through in every direction. The cage arrives unpainted, ready to be finished in your own colour after welding.

Frequently asked questions

What does V4 add compared with V3?

V4 adds an extra diagonal brace and a harness bar on top. The harness bar is the mounting point for the shoulder straps; the diagonal stiffens the main hoop. The Multipoint E46 Sedan V4 NASCAR also retains the door bars with curved tubes instead of a straight door bar.

Why ten welded mounting points instead of eight?

The multipoint design is attached to the bodyshell at ten points, spreading the load over more points of the body than a standard weld-in cage with eight welded mounting points.

What is included in the delivery?

An unpainted weld-in kit with gussets, reinforcement plates, bolts, washers and nuts, documentation, fitting instructions and a sticker set. The cage is intended for track and competition use; always check the regulations of your own organiser.

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.