Unlock Your Vehicle's True Performance
Professional ECU Remapping and Performance Software designed to increase power, improve drivability and maximise efficiency.
Precision-Engineered Performance
From subtle refinement to race-grade recalibrations, every service is delivered with uncompromising attention to detail.
A New Standard of Trust
Professional Equipment
Industry-leading tools and OEM-grade diagnostic hardware for every calibration.
Custom Software
Bespoke files tuned for your exact vehicle, fuel and driving conditions.
Reliable Calibrations
Every map is validated for safety, longevity and OEM reliability tolerances.
Health Checks Before Mapping
A comprehensive diagnostic pass runs before any changes are made.
Performance & Efficiency
More power and torque, with smoother drivability and improved MPG.
Aftercare Support
Ongoing support and revisions after your remap. We stand behind our work.
Meticulous. Methodical. Refined.
Vehicle Inspection
A full visual and mechanical check to ensure your car is ready.
Diagnostic Health Check
Deep scan for fault codes, sensor values and vitals.
Custom ECU Calibration
A bespoke map written for your engine, fuel and driving.
Road Testing & Quality Checks
Real-world testing across load, RPM and temperature ranges.
Customer Handover
Full walkthrough of results, aftercare and support included.
See What Your Vehicle Can Really Do
Enter your registration and see genuine Stage 1 estimates based on your engine’s factory specification — no gimmicks, no inflated numbers.
Check My VehicleTrusted by Discerning Drivers
“Thank you so much bro, I've had maps done in the past never had such good service though 🤣. Appreciate the quick service and the quality map as well feels like a new car defo coming back to you!”
“Very professional, friendly guy who sorted my car out the same day I messaged! Thank you, will be a returning customer.”
“Honestly man cannot thank you enough unreal job im well happy with it. Already had so many people asking about it so ive already recommended you to a few mates and family too. Anything i need done now il be back soon enough. Top man too made me feel like my car was in good hands before he even started.”
“Thank you so much for going above and beyond helping me get my car sorted, I'll definitely recommend you to my close friends and family, feel at ease now that everything is sorted, great service !!”
Answers, Not Assumptions
@srx.performance
Follow our latest builds, dyno results and behind-the-scenes work in Cardiff.
@srxperformance
Watch remaps, dyno pulls, and behind-the-scenes clips from the SRX Performance workshop. Real cars. Real results. Straight from Cardiff.
Request Your Personalised Quote
Fast response, honest advice and calibrations designed around your vehicle — not templated files.