This Sparco Reinforcement Plate is used for installing harnesses to the floor of your vehicle. This will provide a solid backing plate for eye bolts to mount to. Not required for all applications.
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Sparco Eyebolt Plate
£3.00 Incl. VAT
Sport seat. The showroom team sit in these seats every day, so call with your height and waist for the honest fit answer.
- Description
- Additional information
- Size/Fitting guide
- Common Questions
- Availability
- In-store
- Finance
- Delivery
Additional information
| Brand |
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Harness hardware and pad size guide
Everything in this category is sized to one number: the width of your harness straps. Get that right and the rest is straightforward.
2 inch and 50 mm are the same size. So are 3 inch and 75 mmOur harness fittings are labelled in millimetres and our harness pads in inches, so the same strap width looks like two different numbers depending on which page you are on. It is not. Convert once and you can shop across both.
| Imperial | Metric | Where you will see it |
|---|---|---|
| 2 inch | 50 mm | The common shoulder and lap strap width |
| 3 inch | 75 mm | The wider shoulder strap, and some lap straps |
Find your strap width
1Check the harness product pageEvery harness we sell lists its strap width, usually as something like “3 inch shoulder to 2 inch lap”.
2Or measure the webbingLay a strap flat and measure across it. It will be very close to 50 mm or 75 mm.
3Note that shoulder and lap can differA lot of harnesses run 3 inch shoulders with 2 inch laps. If yours does, you need pads to match each.
Of the harnesses we stock, 112 are 2 inch shoulder to 2 inch lap, 38 are 3 inch shoulder to 2 inch lap, 36 are 3 inch to 3 inch and 5 are 2 inch to 3 inch. So mixed widths are common rather than unusual.
Harness pads
Pads slide onto the shoulder straps and stop the webbing digging in over a long stint. They are sold to the strap width, so a 3 inch pad on a 2 inch strap will slide about and a 2 inch pad will not go over a 3 inch strap at all.
If your harness runs 3 inch shoulders, you want 3 inch pads, and the lap strap width does not come into it because pads go on the shoulders.
Eye bolts and fittings
Eye bolts give a clip-in harness something to clip to. They thread into a captive nut in the floor or into a reinforcing plate, and the snap hook on the harness clips through the eye.
Match the fitting to the strap width the same way. A 50 mm fitting suits a 2 inch strap and a 75 mm fitting suits a 3 inch one. If you are fitting a clip-in harness and your car has no suitable threaded points, this is the category you need, and it is worth sorting at the same time as the harness rather than after it.
Check what the mounting point is bolted intoAn eye bolt is only as good as what it threads into. Original seat belt mounting points are engineered for the job. A hole drilled in thin floor pan is not, and wants a spreader plate on the underside. If you are unsure what you are bolting to, send us a photo before you drill anything.
What else you might need
A clip-in harness needs eye bolts or existing threaded points. A bolt-in harness needs threaded points or brackets and no eye bolts at all. A wrap-around harness needs a cage bar in the right place and needs neither. Our harness size and fitting guide covers which installation type is which, and it is worth reading before you order hardware you may not need.
Tell us the harness and we will match the hardwareThe harness make and model, or just its strap widths, and whether it is clip in, bolt in or wrap around. Two minutes on the phone saves ordering the wrong pads twice. Call 0115 989 3488 or email Sales@GSMPerformance.co.uk.
Strap widths read from our own product data across the harness, fitting and pad categories, checked 2 August 2026.
What does it mount to?
A harness needs proper anchor points: a harness bar, cage, or the car’s designed mounting points, plus a seat with the right slots. Tell us the car and seat and we will confirm the mounting plan before you order.
Availability
Sparco stock arrives weekly
Sparco produce in batches and we receive Sparco products on a weekly basis, so the popular seats, harnesses and accessories are usually available for quick dispatch.
Less common models and colours are ordered in for you and take longer.
If you have a date
Tell us when you order and we will confirm the lead time up front rather than after the event. If it is on the shelf we will say so, and if it is coming in on the next delivery we will tell you when that is.
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.
Spread the cost with Klarna
Choose Klarna at checkout and pick the plan that suits you. The options and amounts for this product are shown below.
Use the purchase power check in the Klarna box for a quick, no-obligation look at what you could be approved for before you order.
How it works at GSM SportSeats4u
- 1Add the product to your basket and go to checkout as normal.
- 2Select Klarna as your payment method and choose your plan. Klarna gives you a decision in seconds.
- 3We dispatch straight away. You pay Klarna on the schedule you chose, and any refund goes back through Klarna.
Your questions, answered by Klarna
Klarna is available to UK residents aged 18 and over. Subject to status. Terms and conditions and late fees apply. Klarna Financial Services UK Limited is authorised and regulated by the Financial Conduct Authority. Full details at klarna.com/uk. Every way you can pay with us is on our payment and finance page, or call 0115 989 3488 and we will talk it through.
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.
