Hundreds Of Products Ready Today. Dispatch/Collection Corbeau PSR seats in a Mazda MX-5 Mk1: the one bracket that takes them
A customer asked us this week how to get a pair of Corbeau PSR seats into his MX-5 Mk1. Good question with an awkward answer, because the PSR is a base mount seat and very nearly everything sold for an NA is a side mount.
There is one route that works properly, it is in stock, and there is a second Planted bracket sitting next to it at the same price that will not do the job at all. That last part is where the money gets wasted, so it has a section of its own.
- The PSR is a base mount recliner, drilled for both 291mm and 345mm
- Every PCI kit for the NA is a side mount, and so is the Cybul
- Planted list two NA brackets and only the STANDARD one takes a base mount seat
- £1,120.80 inc VAT for both seats, brackets and runners, all in stock
The short answer
The STANDARD Planted Technology NA seat bracket, Corbeau sliding runners, then the PSR on top. That is £560.40 inc VAT per seat, or £1,120.80 for the pair with everything included.
Read that word standard properly, because Planted list two brackets for this car at the same price and only one of them is any use to you. The other is a side mount. There is a section on it below and it is the thing most likely to cost you money on this job.
Why most NA brackets are the wrong type
Search for MX-5 Mk1 seat mounts and you will mostly find side mounts. PCI do three for this car, an adjustable seat mount, a one piece mount and a sliding subframe, and all three are listed as side mount. Cybul do a well-regarded NA/NB kit and that is a side mount too.
None of them are wrong. They are just built for a different kind of seat. A side mount bolts to brackets on the flanks of a fixed-back bucket. The PSR is a reclining seat with four holes in the bottom of its base, so it needs something flat to sit on.
That is why our existing guide on sitting lower in a Mk1 recommends the Cybul kit: that guide is about bucket seats. This one is about a recliner, and the answer is different.
| Bracket for the NA | Type | Takes a PSR | Price inc VAT |
|---|---|---|---|
| Planted Technology NA bracket (SB101) | Base, a flat plate | Yes, with runners | £222.60 per side |
| Planted Technology NA LOW bracket (SB245) | Side mount uprights | No | £222.60 per side |
| PCI Racing NA/NB adjustable seat mount | Side mount | No | £252.00 per side |
| PCI Racing Mk1/Mk2 one piece mounts | Side mount | No | £330.00 per side |
| PCI Racing Mk1/Mk2 sliding subframe | Side mount | No | £330.00 per side |
| Cybul NA/NB bucket seat mounts | Side mount | No | £94.80 per side |
The PSR is base mount, and drilled twice
The base of a PSR has eight holes in it, not four. Corbeau drill the shell for both of the common base patterns: the narrow 291mm by 330mm set, which is Cobra’s, and the wide 345mm by 271mm set, which is Sparco’s.
For this job that is only good news. It means you are not hunting for one specific runner. Whichever Corbeau runner you put on the Planted bracket, the seat will line up with one of the two sets.
The Planted bracket, and why there are two
Planted list two brackets for the NA at the same price and the names do not tell you what you need to know. One is the Seat Bracket and one is the LOW Seat Bracket, so it reads like a choice of height. It is not. They are two different types of mount.
The standard bracket, part SB101, is a flat steel plate with a hole pattern round the edge. That is the one a base mount seat goes on, with a pair of runners in between. It is what you want for a PSR.
The LOW bracket, part SB245, is not a lower version of the same thing. It is a pair of vertical uprights the seat bolts to through its sides. That is a side mount, and a PSR has no side holes to use, so it is the wrong part however good the price looks. Cameron has sent a set of those back before now for exactly that reason.
The seats
The PSR is the reclining seat we sell most of, and it suits this car for the same reason it suits an Up: it is narrow, the base is low profile, and it comes drilled to fit almost anything.
- Sold as a pair, £558.00 inc VAT, or £279.00 a seat
- Base mount, drilled 291mm x 330mm and 345mm x 271mm
- Steel frame, reclining backrest, 4-point harness compatible
- Tartan Edition also available at £1,056.00 the pair
-
From £880.00 Excl. VATKlarna ReadySelect options This product has multiple variants. The options may be chosen on the product page
What it costs
| Part | Per seat | Both seats |
|---|---|---|
| Planted NA bracket, SB101, the standard one | £222.60 | £445.20 |
| Corbeau sliding runners | £58.80 | £117.60 as a pair |
| Corbeau PSR | £279.00 | £558.00 the pair |
| Total | £560.40 | £1,120.80 |
Prices include VAT and were correct on 19 August 2026. Everything listed here is in stock. The runners come as a 291mm set or a 345mm set and either will line up with a PSR, so order whichever we have moving. The LOW bracket is deliberately not in this table, because it will not take the seat.
![Planted Technology Mazda MX-5 Miata [NA Chassis] (1989-1997) Seat Bracket](https://www.sportseats4u.co.uk/wp-content/uploads/sites/2/2026/08/SB101PA-2-300x300.jpg)
Ordering it so everything matches
Three things to get right and it goes together without a phone call.
Common questions
Will a PSR fit in an MX-5 Mk1 at all?
Yes. It is one of the narrower recliners we sell and the base is low profile, which is what makes it work in a small cabin. The thing to plan for is height, not width, which is why Planted do a LOW bracket for this car.
Can I use the Cybul or PCI mounts I already have?
Not with a PSR. Those are side mounts, made to bolt to the flanks of a fixed-back bucket seat. A PSR is a base mount recliner. If you already own side mounts and you want to keep them, you are looking at a bucket seat instead, and our guide on sitting lower in a Mk1 covers those.
Which runner do I need, the 291mm or the 345mm?
Either. The PSR is drilled for both patterns, so both Corbeau runner sets line up. Tell us it is for a PSR and we will send whichever we have in stock.
Do I need runners at all?
On a road car, yes. The Planted bracket is a flat base that bolts to the floor, and the runners are what let the seat move fore and aft. If you want the seat fixed, say so when you order and we will talk it through.
Should I buy the standard Planted bracket or the LOW one?
The standard one, part SB101, if you are fitting a PSR. Despite the names, these are not two heights of the same bracket. SB101 is a flat plate for base mount seats and SB245, the LOW one, is a pair of uprights for side mount seats.
A PSR bolts through the bottom of its base and has nothing on its sides to bolt to, so the LOW bracket cannot hold it. Neither listing states this, so go by the product photograph or ask us.
Is there a cheaper base mount option for an NA?
There is a Cobra adaption bar set for the NA/NB at £55.00 inc VAT. It is listed under Cobra's own car-specific fitting frames and we have not confirmed it against a PSR, so ask us before you order one on the strength of the price. The Planted bracket is the route we would quote.
What we would order
A pair of PSRs, two standard Planted NA brackets, one driver side and one passenger side, and a pair of Corbeau runners. £1,120.80 and the car has two reclining seats bolted to the factory floor points with nothing cut.
Garreth’s take on the money is that the PSR is the right seat to spend it on in a Mk1. It is narrow, the base is low profile, and it is drilled for both patterns, so if the car changes hands or you change your mind about frames the seat still fits something. There are cheaper recliners and none of them are as easy to live with in a small cabin.
The only real trap is the bracket names. The LOW one is not a lower version of the standard one, it is a side mount, and it is the same price so nothing on the listing warns you off. If you take one thing from this page, take that.
And if it turns out you want a fixed-back bucket after all, stop before you order any of this. That is the side mount route, the LOW bracket comes back into play, and every other part on this page changes.
Ring us on 0115 9893488 with what you are trying to do and Cameron will tell you which bracket you are actually looking at, or bring the car over and we will have a look together.