OMP – Ford Sierra Cosworth direct Fit Subframes

From £131.10 Incl. VATFrom £109.25 Excl. VAT

Seat fitting hardware for the Ford Sierra Cosworth. Mounting stacks are specific to the seat pattern, so tell us your seat and car and we will confirm the complete kit.

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SKU: HC778-2646 Categories: OMP Car Specific Fitting Frames, OMP Car Fitting Frames

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An OMP direct fit subframe for the Ford Sierra Cosworth. Part number HC778-2646.

It shares a part number with the Escort Cosworth

Which is correct rather than an error, and it tells you something real about the cars. Our Escort Cosworth frame is HC778, and the Escort RS Cosworth is a Sierra Cosworth underneath: Ford built it on a shortened Sierra 4×4 floorpan with an Escort shell over the top.

So the seat mounting is shared, and one frame design covers both.

Which car, and it changes the approach

A three door RS500 is worth a great deal and should be kept entirely original. A four door Sapphire Cosworth is a considerably more usable proposition and plenty are still competing.

Tell us which you have and what it is for. If it is a historic or rally class car, tell us the class, because those rulebooks are frequently specific about seats and mounting.

The frame bolts to the factory mounting points so nothing is cut. Order twice for a pair.

Additional information

Brand	OMP Racing
Sport Seat Position	RHD Driver Side, RHD Passenger Side
Make & model	Ford Sierra Cosworth
Fixing Type	Base Mount
Fixing Bolt Pattern	345mm x 271mm, 405mm x 290mm
Construction	Steel
Compatible Seats	Corbeau base mount seats, OMP base mount seats, Recaro base mount seats, Sparco base mount seats
Sold As	Single

What's included?

Photos are for illustration: It is very important to point out that the main product photos are entirely for illustration only. With over 1000 different frames available for different vehicles and applications, the manufacturer images provided are entirely illustration. What you receive may differ from this image.

What will be in the box? There are several types of seat frames which may be supplied depending on the vehicle and application. You may receive 1 of the following 4 types. If you are using them with a certain seat, please contact us in advance for professional advice.

#1. A full replacement frame with a sliding runner and resisitor kit
#2. A full replacement frame with a sliding runner
#3. A full replacement frame only
#4. An adaption bracket kit

Additional seat belt brackets: Each seat frame can be used for a variety of applications including road car reclining seats throuh to Motorsport FIA seats. Seat belt brackets are not required in a range of application so manufacturers generally do not supply them with their frame kits. If you require seat belt brackets please contact us in advance

NOT SUITABLE FOR OEM/FACTORY seats removed from other vehicles

Bolt point tolerances:

Please note that OMP, Sparco and various other brands have a +/- 10mm tolerance on the bolt point locations on each of their sub-frames. This means that when installing the equipment into your vehicle, you may find that one or more of the bolt points may need extending for a perfect fit.

This is normal and, when installed by a skilled professional, it may only add five minutes to the total installation time. A prime example is the OMP Renault Clio MK3 frames and the BMW E46 frames as two bolt points need extending by 5mm in 75% of installations.

Drilling of frames and equipment may be required to complete your installation.

Matching seats and frames:

There are over half a dozen different bolt patterns in the industry for base mounted seats. There are over 30 different bolt patterns for side mounted seats. Aftermarket frames from different brands will have different bolt location points.

Seats and frames are not a direct fit between brands. Seat frames are also not suitabled for OEM seats (Fitted into a vehicle from the factory) Please ensure to contact us for professional advice before purchasing your seat frames. We will be able to provide you a recommendation as to which seat frame is right for which seat.

Have you written anything useful for my car?
Yes: Safety Devices Ford Sierra Roll Cages Updated. Those are written around the same car, from real fittings and customer questions, so they are worth a look before you decide.

Will this fit my car?
This frame is made for the Ford Sierra Cosworth. Chassis code and years matter more than the badge, as floor pans change between generations, so if your car sits near a changeover year, send us the registration and we will confirm before you order.

Which seats does it take?
It takes seats drilled 345mm x 271mm (the Sparco and OMP seat pattern) and 405mm x 290mm (the Recaro seat pattern). If your seat is not listed, tell us what you run and we will confirm the fit.

Do I keep fore-and-aft adjustment?
Only with a sliding runner between the frame and the seat, which is a separate part on OMP frames. If more than one person drives the car, budget for the runner. Our guide to sliding runners explains the options and widths.

Base mount or side mount, and does it matter?
This is a base-mount frame: the seat bolts down through its base, the simpler stack that suits seats with a flat bottom and keeps the install low-fuss. Our guide on base mount versus side mount explains the whole fitting stack.

Is this for the driver or passenger side?
Both sides are available on this listing, pick driver or passenger side at the point of order (sides listed are for right-hand-drive cars). Left-hand-drive car? Ask us, as the sides swap over and availability varies by model.

Availability

OMP deliveries arrive every two weeks

OMP produce in batches and we receive their products on a fortnightly basis, so their most popular seats, harnesses and equipment are generally available for quick dispatch.

Reclining sport seats and less common trims are brought in to order, so those take longer.

If you have a date

Tell us when you order and we will confirm the current lead time before you commit, rather than leaving you to find out afterwards.

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, and they update when you choose an option above.

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.

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OMP – Ford Sierra Cosworth direct Fit Subframes

Add a sliding runner: