Safety Devices 3″/3″ 6 Point Lightweight FIA Harness

Name: Safety Devices Lightweight FIA Harness 1 | Best Price, In Stock
SKU: SDIHRNM1
Price: 202.52 GBP
Availability: InStock

£243.02 Incl. VAT£202.52 Excl. VAT

Safety Devices Lightweight FIA Harness by Safety Devices. Brand: Safety Devices. Available now from stock.

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Size/Fitting guide

SKU: SDIHRNM1 Categories: Safety Devices Harnesses, FIA Motorsport Harnesses

Safety Devices Lightweight FIA Harness by Safety Devices. Here is what it is and what to check before you order. A harness holds you in the seat so the seat can do its job. Four, five and six point layouts differ in how they control the lap belt and the sub strap, and competition regulations usually specify which you need.

Safety Devices Lightweight FIA Harness specification

Category	Safety Devices Harnesses
Brand	Safety Devices
Part number	SDIHRNM1

Choosing the right harness

A harness holds you in the seat so the seat can do its job. Four, five and six point layouts differ in how they control the lap belt and the sub strap, and competition regulations usually specify which you need.

Shoulder straps want mounting behind the seat at roughly shoulder height, angled no more than the manufacturer allows. Mounting them too low or too high is the most common harness fitting mistake and it matters in a crash.

We have been supplying motorsport kit since 2003, so if you are unsure between two options, ask.

What to check before you order

A handful of details decide whether this harness suits your car. These are the ones that matter.

Brand: Safety Devices. Check this against what you already run before ordering.

If any of it does not match what you have, ask us before you buy.

Buying the Safety Devices Lightweight FIA Harness from SportSeats4u

Stock is shown live on this page. If you need the Safety Devices Lightweight FIA Harness for a specific event date, tell us when you order and we will confirm the lead time up front.

We have been in the motorsport trade since 2003, supplying club racers, race teams and workshops across the UK and exporting worldwide. That means the advice you get on fitment comes from people who use this kit, not from a spec sheet someone copied over.

If you are buying for yourself and you are torn between two options, call us. Five minutes on the phone usually settles it.

Safety Devices Lightweight FIA Harness questions

Is the Safety Devices Lightweight FIA Harness FIA approved?

Check the approval in the specification above. FIA harnesses carry an expiry date and scrutineers do check it, so buy with the remaining life in mind.

What do I mount the shoulder straps to?

A harness bar or a cage harness bar set at the right height. Mounting to the rear seat belt points or the floor behind the seat puts the strap angle badly wrong.

Four, five or six point?

Six point controls submarining best and is what most competition regulations now expect. Four point is simpler but allows more movement. Check your class regulations before choosing.

Can I fit a harness with the standard seat?

Only if the seat has proper harness slots. A harness pulling over the top of a standard seat back is not safe.

Not sure the Safety Devices Lightweight FIA Harness is the right choice? Send us your car details or what you compete in and we will confirm before you order.

Browse more safety devices harnesses. Related: Auto Style Type RR Bucket Seat, Safety Devices 4 Point Clubman, Safety Devices 3 Point Clubman. Background reading: motorsport disciplines and what they require.

Weight	3.4 kg
Brand	Safety Devices

In-store displays:

We have a premium range of over 125 seats from brands including: Bimarco, Cobra, Corbeau, Sparco, OMP, Recaro, GP-Race, and Bride to name just a few brands we work with.

Alongside this, we also stock and display HANS devices, harnesses, race-wear, race-suits, FIA helmets and various other safety equipment. If you are looking to visit us to see and try any particular seat or product, please contact us in advance and we’ll be happy to help.

In-Store appointments:

Due to the specialist nature of our services, we do ask that you please contact us in advance to book an appointment. We have multiple slots available each day including selected availability at the weekend.

Working by appointment allows us to dedicate our time with you and provide a personal and professional service. We’ll always ensure you leave with the right equipment for your needs.

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Fast delivery lead times:

If you require fast delivery, please contact us in advance of ordering and we’ll happily check stock allocation and availability for you. We carry a large amount of stock at our showroom and across multiple distribution hubs. This allows us to provide immediate dispatch across a huge number of brands from Corbeau and Cobra through to Sparco and OMP. (Does not apply to all items)

Due to the niche market we work in, some products are custom hand made to order, or special order from manufacturers like PCI Racing and Planted Technology. If you want to know how fast a product will be dispatched. Simply drop us a message through our Contact us form.

Addtional lead time notes:

Quick dispatch: Stocked products are dispatched within 24-48 hours with Parcel Force.
Sparco roll cages: We can only deliver these to a registered (LTD) company address.
In-store collection: Please contact us in advance to book an in-store collection appointment.

Production lead times

Safety Device roll cages are custom made to order by Safety Devices. Safety Device products are currently under extreme high demand so we strongly recommend planning in advance and ordering your roll cage as early as possible.

Current lead times: Roll cages ordered today, are estimated to be produced, completed, and delivered to you within 10-16 weeks. (+ August factory shut down period and Christmas closures) We will keep updating this date as it changes.

Click and collect: Please note, CLICK AND COLLECT on checkout will be from the manufacturer saving on any transport costs. This is NOT from our showroom address. The collection will be from Safety Devices International Ltd, Cambridge House, Holborn Avenue, Mildenhall, Suffolk, IP28 7AN

Roll cage specification and fitment guide

Roll cages are not sized to you. Every one we sell is made for a specific car, so the first filter is your make, model and year. After that you are choosing four things: bolt-in or weld-in, how many mounting points, which material, and which approval you need.

Start with the regulations, not the cageWhich cage you can use is decided by your championship or club, not by preference. A cage that is wrong for your class is an expensive thing to find out about at scrutineering. Check the regulations first, then filter.

Bolt-in or weld-in

Type	How it fits	What it means
Bolt-in	Bolts to mounting plates on the floor and sills	Removable. No welding. The usual choice for a road car or a track day car
Weld-in	Welded directly into the shell	Permanent and stiffer. What most competition classes require

Bolt-in is the practical choice for a car that is still road registered, or one you might want to return to standard. Weld-in is stiffer, because the cage becomes part of the shell rather than something bolted to it, and it is what most competition classes require. It also means cutting trim and carpet and it is not coming out again.

Mounting points

Configuration	What it is	Typical use
6 point	Six mounting points	Rear cages and lighter installations
Multipoint	Eight points minimum	Full cages. What most championships ask for

A rear cage protects the driver from behind and gives you somewhere to mount harnesses. A full multipoint cage adds the front hoop and the roof. If you are fitting harnesses and nothing else, a rear cage with a harness bar may be all you need, and it is far less intrusive to live with.

Material

Material	What it is	Why you would pick it
CDS	Cold drawn seamless steel	The standard. Strongest value, heaviest of the three
T45	Carbon manganese alloy	Higher strength for the weight, so a lighter cage. Costs more
25CrMo4	Chromoly	The lightest for a given strength. Specialist welding, top of the range

For most road and track day cars, CDS is the right answer and the price difference is better spent elsewhere. T45 and chromoly earn their money in competition where the weight saving is worth paying for, and where the class allows them. Check your regulations, because not every class accepts every material.

Design

Design	What it adds
Single fixed diagonal	The simplest rear brace
Cross diagonal and harness bar	Adds a harness mounting point
Multipoint cross diagonal and harness bar	A fuller structure
With door bars	Adds side impact protection, and makes getting in harder

Door bars are the trade-off worth thinking about. They are a real gain in side impact protection and they make climbing in and out considerably harder, which matters more than people expect in a car you use often. If the car is road driven, try getting in over a door bar before you commit.

Approvals, and what our labels mean

These are the exact terms you will see on our products, and they are not interchangeable.

AFIA Approved, and FIA / Motorsport UK HomologatedCarries an FIA homologation. What international and top-level national competition requires.

BMotorsport UK Nationally HomologatedHomologated for UK national competition.

CMotorsport UK Homologated (installation approval required)Homologated, but the fitted installation itself has to be approved as well. Factor that into your timescale.

DMSUK CompliantBuilt to the Motorsport UK specification.

ENot for competition useTrack day and road cages. Not accepted for competition.

Fitting and finish

Our cages are manufactured in the United Kingdom and supplied in bare metal, with powder coating available as an option. Bare metal is the standard because most people want to paint or coat it to match the car, and because a coated cage still has to be prepared where it welds.

Get a weld-in cage fitted properlyA weld-in cage is a structural part of the car. It wants fitting by someone who does it regularly, and where the approval says installation approval is required, it has to be signed off as well. Bolt-in cages are within reach of a competent home fit, but read the instructions before you start rather than after.

Before you order

Check the exact model and year against the product. Our cages are listed to specific variants, and a Focus Mk3 cage is not a Mk2 cage. Some are listed as rear cage only, which is easy to miss when the title otherwise matches. If your car has a sunroof, a different roof pressing or a factory option that changes the shell, tell us before you order.

Tell us the car and the championshipMake, model, year and exactly what you are competing in, or whether it is track days only. The regulations narrow the choice more than anything else, and we would rather work through it with you than have a cage come back. Call 0115 989 3488 or email Sales@GSMPerformance.co.uk.

All specifications read from our own product data across the roll cage categories, checked 2 August 2026. Approval wording is quoted as it appears on our products. Always confirm against your current championship regulations, which change.

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