Real Race Seats 15 Litre Poly-Bead Resin Seat Insert Kit

Name: Real Race Seats 15 Litre Poly-Bead Resin Seat Insert Kit | Best Price
SKU: RE-RDK-08-010
Price: 165.70 GBP
Availability: InStock

£198.84 Incl. VAT£165.70 Excl. VAT

Real Race Seats 15 Litre Poly-Bead Resin Seat Insert Kit by Real Race Seat Inserts. Brand: Real Race Seat Inserts. Available now from stock.

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Size/Fitting guide

SKU: RE-RDK-08-010 Categories: Real Race Seat Inserts, Race Seat Insert Kits

The Real Race Seats 15 Litre Poly-Bead Resin Seat Insert Kit is a seat from Real Race Seat Inserts, supplied from stock. Seat choice comes down to how the car is used. A fixed-back bucket holds you best and is what competition regulations expect, but it is harder to live with on the road. A reclining sports seat gives up some support for adjustment and everyday usability.

Real Race Seats 15 Litre Poly-Bead Resin Seat Insert Kit specification

Category	Real Race Seat Inserts
Brand	Real Race Seat Inserts
Part number	RE-RDK-08-010

Choosing the right seat

Seat choice comes down to how the car is used. A fixed-back bucket holds you best and is what competition regulations expect, but it is harder to live with on the road. A reclining sports seat gives up some support for adjustment and everyday usability.

A competition seat needs a vehicle-specific fitting frame, and usually side mounts as well. Check the seat width against your car’s tunnel and sill before ordering, because a wide shell in a narrow car is a common and expensive mistake.

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 seat suits your car. These are the ones that matter.

Brand: Real Race Seat Inserts. 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 Real Race Seats 15 Litre Poly-Bead Resin Seat Insert Kit from SportSeats4u

Stock is shown live on this page. If you need the Real Race Seats 15 Litre Poly-Bead Resin Seat Insert Kit 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.

Real Race Seats 15 Litre Poly-Bead Resin Seat Insert Kit questions

Will the Real Race Seats 15 Litre Poly-Bead Resin Seat Insert Kit fit my car?

The seat needs a vehicle-specific fitting frame to mount to the floor. Tell us the car and we will confirm which frame you need alongside it.

Is it FIA approved?

Check the approval listed in the specification above. FIA-approved seats carry an expiry date, so check that too if the seat is for competition.

Can I use my standard seat belt?

With a reclining seat, usually yes. With a fixed-back bucket and harness slots, a harness is the safer answer, and some competition regulations require one.

How do I know what size I need?

Measure across your hips and compare against the seat width in the specification. If you are between sizes, go up, because a seat that is too narrow gets painful quickly.

Not sure the Real Race Seats 15 Litre Poly-Bead Resin Seat Insert Kit is the right choice? Send us your car details or what you compete in and we will confirm before you order.

Browse more real race seat inserts. Related: Real Race Spacer Fabric, Real Race Single Cell Inflatable Lumbar Support, Real Race 3 Cell Inflatable Lumbar Support. Background reading: motorsport disciplines and what they require.

Brand	Real Race Seat Inserts

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.

Availability

We stock a wide range of the Real Race lumbar support pump up cushions in various sizes. These can be made available for dispatch within 24 hours.

Specicalist components: Various materials and specialist components are directly sourced from the manufacturer to order. This direct delivery method means that most in stock parts are delivered within an estimated 7-10 days.

Need them fast? Please contact us in advance to check our stock and product availability. we may be able to dispatch them within a shorter lead time. Speak to us in advance to find out how we can assist.

Seat insert kit and cushion guide

These are the two ways to change how a seat fits after you have bought it. A cushion changes your height in the shell. An insert kit moulds the shell to your body. They solve different problems.

Which one do you need

If the seat fits but you sit too low or too high, you want a cushion. If the seat is the right size but you move around in it, or it is a size too big and you want it to hold you properly, you want an insert kit.

Seat cushions

Sold as low, medium and high, and the name is the cushion thickness rather than anything about the seat. It is the cheapest way to fix a driving position that is nearly right.

Type	What it does	Who it suits
Low cushion	Drops you as far into the shell as it goes	Tall drivers, and anyone short of helmet clearance
Medium cushion	The standard	Most drivers, most cars
High cushion	Lifts you up in the shell	Shorter drivers, and better vision over the bonnet

Check headroom before you go upA high cushion lifts you toward the roof, and in a car with a cage and a helmet that is exactly where you have least room. If you are close, measure before you order. Going the other way, a low cushion is the first thing to try if your helmet is touching.

Most of our cushions are made for a specific seat, currently the Mirco Classic, GT, RS1, RS2, RS7, RTS-2 and RTX-7. Check the compatibility on the product, because a cushion cut for a different shell will not sit right.

Seat insert kits

An insert kit is expanding foam and a bag. You sit in the seat, the foam expands around you, and it sets to the shape of your body. It is what single seater and rally teams use to make one shell fit one driver properly, and it is the answer when a seat is a size too big.

Sold for	Litre size	What it suits
Small drivers	30 to 40 litre	A slim driver in a standard shell, or filling a small gap
Medium and small drivers	40 to 50 litre	The usual starting point
Large and medium drivers	50 to 70 litre	More material, for a bigger gap or a deeper shell

The litre figure is the volume of foam in the kit, not a measurement of you or of the seat. More litres fills a bigger gap. If you are between two, the larger kit gives you room to get it right, and you can trim the result.

You get one attemptThe foam sets once. Read the instructions properly, have someone to help you, and be dressed exactly as you will drive, in your suit, with your helmet and your head restraint on and the harness done up. Any layer you leave off is a gap you will feel every time you get in afterwards.

FIA 3795:1992

Six of our insert kits carry FIA 3795:1992, which is the standard for the foam itself. If you are running in a championship that requires an approved insert, check for it on the product. The rest are for road, track day and club use where no approval is required.

A note on sizing up and padding out

If you are between two seat sizes, our advice on the bucket seat guide is to take the wider one. An insert kit is what makes that advice work. A seat that grips your hips cannot be made bigger, but a seat that is slightly loose can be made to fit you exactly, and it will be more comfortable than either the smaller seat or the loose one.

Not sure which fixes your problem?Tell us the seat, what is wrong with how it fits, and your height. Sitting too low, sliding about and being pinched at the hips all have different answers and it is worth getting the right one. Call 0115 989 3488 or email Sales@GSMPerformance.co.uk.

All figures read from our own product data across the insert kit and cushion categories, checked 2 August 2026.

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