Hundreds Of Products Ready Today. Dispatch/Collection Talk to someone who sells this kit every day
Seat sizing, bracket compatibility, harness mounting angles and whether a chosen setup will fit your car. Ring, message, email or come in. Garreth and Cameron handle these questions from the showroom every day.
Which route suits what
All four reach the same two people. Some are just faster for some jobs.
01Phone
Answered by CallyAI, our AI phone agent, which does a good deal more than take your name. It books showroom appointments, gives technical advice, takes messages and sends written quotations. No menu, no extension to ask for, just tell it what you are after.
02WhatsApp
Same number. This is the one to use for fitment. Send photographs of the seat mounting points, the floor and the rear bulkhead and we can tell you what will bolt in without either of us describing it in words.
03Email
Sales@GSMPerformance.co.uk. The right choice when there is an order number involved, when you want a written quotation, or when you are sending a list of parts for a build.
04In the showroom
By appointment, Monday to Friday between 10.00am and 4.00pm. Sitting in four seats settles the size question in ten minutes. Bring the car if you can and we will measure the door aperture properly.
Where we are and when we are open
Off the A46 in Nottinghamshire. Visits are by appointment, so book rather than turn up if you are travelling.
GSM Performance
Unit 5 and 6, High Hazles Road
Nottingham
NG12 3GZ
Those are showroom hours, and visits need booking. Messages sent outside them are picked up the next working day, so send them rather than sitting on them until Monday morning.
What to send us so we can answer first time
None of this is compulsory. It just turns a three day conversation into one reply.
The car, properly
Make, model, year and which side the steering is on. Year matters more than people expect, because floorpans and seat mounting points change mid model run and a bracket that fits a 1997 car will not always fit a 1999 one.
What the car is for
Road, trackdays, a championship, drifting, rallying, a sim rig or a show car. This decides whether you need FIA approval at all, and approval is most of the price difference between two seats that look identical.
Your height and waist size
Not vanity sizing, the honest number. Waist decides the shell width and height decides whether you clear the roof with a helmet on. If you are near the edge of a published range, say so and we will steer you.
Photographs, if you have them
The seat area with the old seat out if it is already out, the floor, the transmission tunnel and the rear bulkhead if you are asking about harnesses. WhatsApp is easiest for this.
Put your order number in the first line. It starts SS4U on this site and GSM on gsmperformance.co.uk, and it is on your confirmation email and your invoice. With the number we can see the warehouse, the courier and the tracking in one go instead of asking you three more questions first.
Send us a message
Pick the closest category and give us as much of the above as you can. Everything lands in the same inbox.
Sizing is the one thing a message cannot settle. Two shells with the same published waist range hold two drivers completely differently, and you only find that out by sitting in them.
Book a showroom slot or read what is on the floor.
Our other stores
Same company, same phone number, same two people. The catalogue is split up so each site can go deep on what it sells.
Common questions
What is the quickest way to get an answer?▾
Ring 0115 9893488. CallyAI answers, and for most questions that is the end of it. If it is a fitment question and you have photographs, WhatsApp on the same number is usually quicker still, because we can look at the actual car rather than guess from a description.
Who answers the phone?▾
CallyAI, our AI phone agent. It can book you a showroom appointment, give technical advice, take a message, and send you a written quotation. It is not a menu system and there is no extension to ask for, just say what you need.
Can I get advice before I order?▾
That is most of what we do. Tell us the car, the year, what you use it for and roughly what size you are, and we will tell you what fits and what to avoid. There is no charge and no obligation.
I need an update on an existing order.▾
Have your order number ready. It starts SS4U on this site and GSM on gsmperformance.co.uk. With the number we can see exactly where the item is and which warehouse it is shipping from.
Do you answer at weekends?▾
The showroom is Monday to Friday, 10.00am to 4.00pm. Messages sent at the weekend get picked up on the next working day, so send them anyway rather than waiting until Monday.
Can you build me a seat guide for my car?▾
Yes, and there is an option for it on the form. Tell us the car and what it is used for and we will put together the seat, bracket and harness combinations that actually work on it.
Do you deal with trade, teams and clubs?▾
Yes. Race teams, clubs, sim rig builders, marine and stadium projects all come through the same form. Pick the closest category and describe the job, and we will come back with a proper quotation.
Where do I send a return?▾
Do not post anything back before you speak to us. Read the returns and exchanges page first, then contact us for a returns form and the address to use. Parcels sent back without a form take much longer to process.
Find us on social media
Customer cars, new stock and whatever has just come off the van.
Tell us the car and we will tell you what fits
No charge for advice and no obligation to buy anything. If we do not list something that suits you better, we will say so.
Call 0115 9893488Book the showroomEmail us