About RJM Performance
Meet Riley Matthews.
Daily driver or weekend weapon, looked after with the same care, workmanship and straight talk.
At RJM Performance, we look after everyday drivers and enthusiasts with the same care, workmanship, and straight talk. Based in Somerton Park, we combine reliable logbook servicing with precision upgrades, so your car feels tight, safe, and genuinely better to drive.
We keep things simple: honest pricing, clear timelines, and work that speaks for itself. From routine maintenance to suspension setups, brake packages and full engine rebuilds, everything is done in-house by techs who actually love cars. If something doesn't need replacing, we'll tell you. If there's a smarter way to repair or upgrade, we'll show you.
What matters to us is how your car feels when you pick it up. Responsive, confidence-inspiring, and ready for whatever you've got planned next.
At a glance
- Owner and mechanic: Riley Matthews
- Based in Somerton Park SA 5044
- Open Mon to Fri 8:00am to 5:00pm
- Servicing, repairs and performance work, done in-house
What we stand for
How we work.
Honest pricing and clear explanations
You'll know what we found, what it costs and why it matters before a spanner turns. If something doesn't need replacing, we'll say so.
Workmanship that prioritises safety and feel
Brakes, suspension and steering done properly, so the car stops straight, sits right and feels tight on the road.
Enthusiast knowledge without the ego
We love cars and we'll talk you through options for your model and goals in plain language. No jargon, no talking down.
The workshop
Where the work happens.
A few real photos from around the workshop.
Reviews
Don't take
our word for it.
Real reviews from real customers, word for word. Honest work tends to get talked about.
A great find
“Without a doubt the most honest, respectful and helpful mechanic I've ever used! Goes over and above.”
Fantastic service
“We recently had our car serviced and couldn't be happier with the results. Highly recommend and will definitely be using them again.”
A great experience
“Riley was able to fix my car quicker and cheaper than anyone else.”
Beyond expectations
“RJM Performance were a breath of fresh air, professional, knowledgeable, and genuinely passionate about what they do.”
Had your car in with us? We'd love to hear how it went.
Read more reviews on GoogleBring it to Riley.
Servicing, repairs or the upgrade you've been planning. Tell us about your car and we'll give you a straight answer.