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Description

AST Multipoint Weld-in Roll Cage Nissan Silvia S14 Coupé V4

The Multipoint S14 Coupé V4 is a full roll cage from AST Roll Cages for the two-door Nissan Silvia S14, with ten welded mounting points and a structure that runs from the rear suspension area all the way to the bulkhead.

The V4 builds on the door bars of the V3 and adds two things: an extra diagonal brace in the main hoop and a harness bar behind the seats. That diagonal is what keeps the main hoop in shape in a rollover. The harness bar is the practical gain for anyone who drives seriously, because it allows your shoulder straps to be anchored at the prescribed height and angle.

The cage is supplied unpainted.

Key benefits

• Harness bar behind the seats for a correct anchorage point for your shoulder straps
• Extra diagonal brace in the main hoop to prevent deformation in a rollover
• Door bars in both doors, carried over from the V3
• Ten welded mounting points spread across the entire chassis
• E355 steel, 45 mm main hoop and 40 mm secondary structure
• Laser scan of each bodyshell for a fit without bending to suit
• Supplied unpainted as a complete weld-in kit

Suitable for

Nissan Silvia S14, two-door Coupé

• S14 and S14a, rear-wheel drive
• Roofs without a sunroof
• Roofs without headlining
• Circuit driving, drifting and track days

Technical specifications

• Manufacturer: AST Roll Cages
• Part number: CMBN01680
• Material: E355 steel
• Main hoop tube diameter: 45 mm
• Secondary structure tube diameter: 40 mm
• Foot and reinforcement plates: 3 mm steel, custom-made for each car
• Mounting: 10 welded mounting points on the bodyshell
• Weight: 210 kg
• Finish: unpainted
• Sunroof: for roofs without a sunroof
• Headlining: for roofs without headlining
• Rear anchorage: in the rear suspension area
• Rear structure layout: X design
• Included: weld-in kit, gussets, reinforcement plates, bolts, washers, nuts, documentation, fitting instructions and sticker set

Fitting and delivery

Set the position of your bucket seats before the harness bar is welded in for good. The height of that bar determines the angle of your shoulder straps, and it has to stay within your harness manufacturer’s specifications. Otherwise, the usual work applies: stripped car, mounting points ground back to bare metal, ten points welded.

The cage is custom-built after you order, with a delivery time of 15 to 35 working days.

The version in which your harnesses finally get an anchorage point that matches the rest of the car.

Why choose this Multipoint S14 Coupé V4?

Many S14 builders only discover late in the build that there is nowhere decent to mount their harnesses. Falling back on the original mounting points often results in too steep an angle, which is counterproductive in an impact. The harness bar in this version solves that neatly in one go. The extra diagonal brace in the main hoop also provides exactly the rigidity that matters in a rollover.

Frequently asked questions

Is this a half or a full roll cage?

A full roll cage, welded to the bodyshell at ten points and extending right into the front section of the car.

What does V4 add compared with V3?

The Multipoint S14 Coupé V4 has an extra diagonal brace and a harness bar behind the seats. The V3 does not.

Can I attach my shoulder straps to the harness bar?

Yes, that is what the bar is for. Stick to the angle your harness manufacturer specifies, which is why you should set the seat position before welding.

What layout does the rear structure have?

This version has an X design rear structure.

Is this roll cage homologated?

AST does not state an FIA homologation number for this item. The cage is intended for track and competition use; check the regulations of your own organiser.

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.