The Mk3 GSI was built from 1991, and the last ones are now in their mid-thirties. The factory bolsters on most of them have gone: compressed from regular use, cracked where the trim has hardened, or worn through at the edges. Fitting a proper sport seat on the original mounting points makes a bigger difference to how the car feels than most other changes at the same price, and it does not require any modification to the floor.
There is one frame available for the Mk3 GSI from us: Cobra’s direct fit subframe. It includes a sliding runner, bolts to the factory mounting points, and takes both Cobra recliners (291mm x 330mm base mount) and Corbeau recliners, which are drilled for both the 291mm and 345mm patterns. That gives five seats in this guide.
The Mk3 GSI has one frame available from us: Cobra’s direct fit subframe. A direct fit frame replaces the complete original seat arrangement and includes a sliding runner in the price. That means the hardware for one seat conversion is one frame and one seat, nothing else. The frame bolts to the factory floor mounting points without drilling, which matters on a car you want to keep standard underneath.
Runner included. Bolts to the factory Mk3 GSI mounting points. Takes Cobra base mount recliners (291mm x 330mm) and Corbeau recliners (drilled for both 291mm and 345mm).
The Cobra subframe carries a 291mm x 330mm bolt pattern. Cobra recliners use that pattern. Corbeau drill their recliners for both 291mm and 345mm, so every Corbeau in this guide fits the same frame without an adaptor. Seats built only for the 345mm Sparco pattern do not fit the Cobra frame.
| Seat | Bolt pattern | Cobra direct fit frame |
|---|---|---|
| Corbeau PSR | 291 or 345 | Fits |
| Cobra Daytona | 291 x 330 | Fits |
| Cobra Le Mans | 291 x 330 | Fits |
| Corbeau RRS Low Base | 291 or 345 | Fits |
| Cobra Misano Anniversary | 291 x 330 | Fits |
The PSR comes as two seats in the box. On a car where the job is sorting both sides cleanly, that often settles the question without having to spec everything separately. The build is honest for the price, with an open base mount that makes entry and exit straightforward in the Mk3’s cabin. Both seats in the box are drilled for 291mm and 345mm, so they go onto the Cobra frame directly.
The Daytona is where most Mk3 GSI track day conversations end up once the budget allows it. The bolsters are deeper than the PSR’s: they hold hips and shoulders through a corner so your arms do the steering instead of holding you in place. Cobra build each one to order through the Signature range, so you specify fabric, vinyl or leather with your stitching colour, plus heating or lumbar if the car needs them. The Tartan variant is the same seat in a period-correct tartan cloth, which suits the car’s era well at club events and shows. Both take the same 291mm pattern and bolt straight onto the Cobra frame.
The Le Mans sits between the Daytona and the Misano in the Cobra range. It shares the same Signature build route as the Daytona, with the same trim and colour options, but a slightly different shoulder profile that some drivers find better suited to longer road stints. Three standard finishes are available: the standard version at £618.99, the Heritage in a period cloth at £648.99, and the Carbon in a carbon-look finish at £713.99. All three use the same 291mm pattern and fit the Cobra frame directly.
The standard RRS has a tall backrest, and in the Mk3’s roofline that eats headroom before you have finished fitting it. The Low Base brings the whole seat height down without changing the backrest profile or the support it gives on track, so you keep the lateral hold of the RRS without losing the clearance you need on the road. Drilled for both patterns, fits the Cobra frame directly. If headroom is the first question, this is where to start.
The Misano Anniversary is the top of the Cobra recliner range. Premium materials, the complete Signature options, and a backrest profile that holds you correctly on a long track session without becoming uncomfortable on the road. The Spec 2 is the same seat in a different standard trim at the same price. At £1,648.99 it is a significant spend on a Mk3 GSI, but if the car is properly set up and used regularly, it is the seat that makes the whole thing feel finished. Same 291mm pattern, same Cobra frame.
The Cobra direct fit subframe for the Mk3 GSI comes with a sliding runner included in the price. There is nothing extra to order for the mounting hardware. One complete seat conversion is one frame and one seat. The frame bolts to the factory floor mounting points, so the floor stays standard.
The one thing to check before the car moves is seat belt buckle clearance. A sport seat often puts the buckle somewhere different to where it was on the factory setup, and it is worth confirming the belt clicks home cleanly before you drive. If you want to talk through the frame and seat combination before anything goes in the basket, give us a call on 0115 9893488.
| Your seat | Frame to order | Runner |
|---|---|---|
| Corbeau PSR | Cobra direct fit subframe, £231.66 inc VAT per seat | Included with frame |
| Cobra Daytona | Cobra direct fit subframe, £231.66 inc VAT per seat | Included with frame |
| Cobra Le Mans | Cobra direct fit subframe, £231.66 inc VAT per seat | Included with frame |
| Corbeau RRS Low Base | Cobra direct fit subframe, £231.66 inc VAT per seat | Included with frame |
| Cobra Misano Anniversary | Cobra direct fit subframe, £231.66 inc VAT per seat | Included with frame |
| Seat | Bolt pattern | Price inc VAT |
|---|---|---|
| Corbeau PSR | 291 or 345 | £558.00 per pair |
| Cobra Daytona | 291 x 330 | From £598.99 |
| Cobra Le Mans | 291 x 330 | From £618.99 |
| Corbeau RRS Low Base | 291 or 345 | £498.00 |
| Cobra Misano Anniversary | 291 x 330 | £1,648.99 |
Prices include VAT and were correct on 27 September 2026. The PSR price covers a pair of two seats. Le Mans pricing is for the standard finish; Heritage and Carbon are priced higher. Misano pricing applies to both the Anniversary and Spec 2 variants.
Yes. The direct fit subframe for the Mk3 GSI comes with a Cobra sliding runner in the package. There is nothing extra to add for mounting hardware. If you were looking at the adaption frame, that one does not include a runner; the direct fit version for this car does.
No. The direct fit subframe bolts to the factory seat mounting points. Check seat belt buckle clearance before you drive, since a sport seat often puts the buckle somewhere different to where it was on the standard setup.
Every seat in this guide is listed by its manufacturer as 4 point compatible, with harness slots in the backrest. Let us know if you are fitting harnesses when you order and we will confirm the full combination works together.
No. Sparco recliners use only the 345mm bolt pattern. The Cobra frame takes the 291mm x 330mm pattern (Cobra seats) and dual-drilled seats like the Corbeau range. A Sparco recliner is not compatible with this frame.
The Mk3 GSI is the F-series Astra from 1991 to 1998. We have separate guides for the earlier Kadett-based Astra Mk3, which uses a different adaption frame route. Each generation has its own frame and seat compatibility.
For a Mk3 GSI that does regular track evenings, the Cobra Daytona is the one to start with. Deep bolsters, built properly, the seat that makes the car feel sorted rather than just fitted. The Tartan variant suits the car’s era well for club events alongside track days. For both seats without the per-seat price, a pair of Corbeau PSRs does the job cleanly on both sides at a fair price. The RRS Low Base if headroom is the first question. The Le Mans is a solid mid-range option if the Daytona is above budget but you still want Cobra’s build quality. The Misano Anniversary if the car is properly set up and used often: at that price it has to earn its place, and on a car in regular use it does.
Call us on 0115 9893488 before the order if you want to talk through the frame and seat combination. Cameron handles these setups most days and can go through the specifics before anything goes in the basket.
The five reclining sport seats we rate for the Vauxhall Astra Mk3 GSI, with the Cobra direct fit subframe route (runner included) and compatibility chart for every seat in the guide.
An E82 135i owner asked which sliding runners mount Recaro Sportster CS seats to the car. The answer: the Planted Technology SB139 bracket at £224.95 a side plus the Recaro double locking runner set at £365.40, and the same stack carries the Recaro Speed.
There is no standard seat bolt pattern. Every pattern across the brands we sell, drawn to scale: the shared Sparco and OMP holes, the Corbeau double drilling, the Recaro lock, Cobra designed sets, BRIDE rail types and the measurements that settle any seat before you buy.
The five reclining sport seats we recommend for the Vauxhall Astra Mk1 (Kadett), built around the Cobra direct-fit subframe that bolts to the factory mounting points. Runner included in the frame price.
A customer building a BMW track car has his harness bar mounted well back and asked if he needs longer shoulder straps. Saloon length is the default, and it is cut to reach.
The Corbeau Sportsman is one of the narrowest reclining seats we sell, 41.5cm at its widest. The actual dimensions, real customer cars it has gone into, and the honest limit of how compact it is: the cushion is narrow too, so it is not the seat for a larger driver.
