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Description

AST Multipoint Weld-in Roll Cage Nissan Silvia S15 Coupé V4

The Multipoint S15 Coupé V4 is a full roll cage from AST Roll Cages for the two-door Nissan Silvia S15, welded to the bodyshell at ten points.

On top of the door bars of the V3, you get an extra diagonal brace in the main hoop and a harness bar behind the seats. The diagonal keeps the main hoop in shape in a rollover. The harness bar is the practical gain for anyone who drives seriously, because your shoulder straps can then be anchored at the prescribed height instead of at the original points, which sit too low.

The rear structure has a V design. The cage is supplied unpainted.

Key benefits

• Harness bar behind the seats for the correct belt angle
• 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
• V design rear structure
• E355 steel, 45 mm main hoop and 40 mm secondary structure
• Custom-made via laser scan of the original bodyshell

Suitable for

Nissan Silvia S15, two-door Coupé

• S15 Spec-R and Spec-S, rear-wheel drive
• Roofs without a sunroof
• Roofs without headlining
• Drifting, track days and competition use

Technical specifications

• Manufacturer: AST Roll Cages
• Part number: CMBN04015
• 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: V design
• Included: weld-in kit, gussets, reinforcement plates, bolts, washers, nuts, documentation, fitting instructions and sticker set

Fitting and delivery

The order matters. Trial-fit the bucket seats in their final position before the harness bar is welded in, because that bar determines the angle of your harness straps. Correcting it after welding means grinding. Otherwise: strip the car, take the ten welded mounting points back to bare metal, weld.

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

The most substantial anchorage AST builds, with your belts at the right height.

Why choose this Multipoint S15 Coupé V4?

Many S15 builders only discover at their first scrutineering that their harness straps run at too steep an angle, because the original mounting points were never intended for that. The harness bar in this version solves that in one go, and the extra diagonal gives the main hoop the rigidity that matters in a rollover. Combined with ten welded mounting points, this is the level most competition drivers end up at.

Frequently asked questions

Is this a half or a full roll cage?

A full roll cage, welded at ten points and extending into the front compartment.

What does V4 add compared with V3?

The Multipoint S15 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. Set the seating position first, so that the angle matches what your harness manufacturer specifies.

What layout does the rear structure have?

This version has a V 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.