Why Choose Castle Performance?

ECU Specialists with years of experience

Castle Performance are based near Bristol, within easy reach of the South West.  We offer mobile specialist ECU Remapping services to enhance your car’s performance, fuel economy and driveability. We also offer vehicle diagnostic services as well as DPF & EGR removal on all vehicle makes and models.


With years of automotive experience you can be sure your vehicle is in the safest hands with expert care. All our engine software technicians are trained specifically for the task, to the highest standard, for your peace of mind. 

At Castle Performance, we only install software that we know will be safe and reliable for your vehicle. We do not recommend anything that will push the boundaries of safe limits in an attempt to reach a higher gain that your car is not capable of handling.

Continued investment into the latest aftermarket and main dealer diagnostic equipment allows us to offer everything a dealer can and more. Often our tools can access a level of computer interrogation that even the main dealers can only dream of. From fault finding to module programming and initialization we have the equipment, knowledge and training.