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Meet Garreth, Cameron, and CallyAI

GSM Performance is a small, independent motorsport safety specialist based in Nottinghamshire. We are not a call centre, not a warehouse-only operation, and not a faceless online retailer. Every enquiry, every order, and every showroom appointment is handled directly by Garreth and Cameron, alongside the way we harness the latest technology, providing a level of detail to our service no other retailer can compare with.

The business was built to solve a simple problem. Motorsport safety equipment is technical, expensive, and often misunderstood, yet most buyers are left to figure it out on their own. GSM Performance exists to make sure customers buy the right equipment, for the right application, with clear advice and proper support before and after the sale.

Garreth Sleigh - Owner and Founder

Founder & Everything Else

I started GSM Performance with a vision to bring expert motorsport knowledge and top-tier service under one roof. From sourcing products to developing our websites, managing the showroom, and overseeing customer service, I keep everything running. If you’ve placed an order, sent an enquiry, or seen our social media, chances are, I’ve had a hand in it.

Cameron Marrison - Admin And Instore

Website & Appointments

Cameron joined me in 2020 and has become an essential part of how we run things day to day. He handles all our website updates, books and manages in-store appointments, and takes care of the admin that keeps us moving smoothly. If you’ve visited the showroom, you’ve probably met him already!

CallyAI - Advanced AI Phone Agent

Advanced AI Receptionist

Cally is our newest addition, and one of the most advanced AI phone and social media manager in the motorsport industry. She’s trained on our entire knowledge base and improves every single day. Whether it’s booking appointments, answering product questions, or providing order updates, Cally can help you 24/7, and she’s getting smarter all the time.

Putting you first

We focus on motorsport safety, not general automotive accessories. That means we spend our time understanding regulations, fitment requirements, homologations, and real-world use, rather than chasing trends. We operate a physical showroom. Customers can see, sit in, and compare equipment before buying, something that is still extremely rare in the UK for this type of product. Advice is based on experience, not scripts. We would rather say something is not suitable than sell the wrong item.

Facebook Rating 90%
Google+ Rating 94%
eBay feedback 98%

3 reasons to trust us

  • Your Safety Comes First – As motorsport safety specialists, we prioritise your protection above all else. #SafetyFirst

  • Real Experience, Real Advice – With over 2,500 sq/ft of showroom space, we offer genuine, hands-on product knowledge you can trust.

  • More Than a Sale – We’re here to build lasting relationships, starting from your very first visit or order.

Harnessing Technology

We’re constantly harnessing the latest technology to push our service to the next level. From cutting-edge customer communication tools to advanced fulfilment and management systems, every part of our business is built for efficiency, accuracy, and growth. With each sale, our systems evolve – making your experience faster, smoother, and more reliable every time.

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How can i help?

Before you leave. Is there anything I can assist with? With 17 years of industry knowledge and hands-on experience, I’m here to help. Let’s get you race ready!