Car & Van Tuning
At Drop The Box Performance, we specialise in expert ECU remapping services for all types of vehicles across Swansea Carmarthenshire and South Wales. Our mobile technicians use dealer-level tools and genuine tuning software to safely enhance performance, torque, and fuel efficiency — all without compromising reliability.
Whether you’re driving a car, van, truck, or even a tractor, we can fine-tune your vehicle’s engine to perform at its best.

Professional ECU Remapping in Swansea, Carmarthenshire & South Wales
Our Remapping Services include-
- Performance Remaps (Stage 1 & Stage 2)
- Economy Remaps (Diesel Vehicles only)
- Adblue Solutions
- DPF Solutions
- EGR Solutions
- Speed Limiters (Add/Remove)
- Custom Requests
Why Choose Drop The Box Performance for Remapping?
- Mobile remapping service covering all of Swansea, Carmarthenshire and South Wales
- Dealer-level equipment and genuine software
- Custom, data-driven remaps for maximum safety and performance
- 5-star rated company with hundreds of happy customers
- Specialists in light commercial and agricultural vehicles
Why Drop The Box Performance?
Our Expertise
Our team consists of highly trained and certified technicians who are passionate about cars and committed to delivering an excellent service.
Customer-Focused Approach
Your satisfaction is our top priority. We offer transparent pricing, honest advice, and personalised service to meet your specific needs.
Ultimate Convenience
We know life is busy and you have better things to be doing than driving for miles and waiting whilst work is completed - so we save you from all that hassle by coming to you!
Our Guarantee
We have a 100% satisfaction guarantee, we don't consider the job complete until you are not just satisfied but over the moon with the service we have provided.

After being messed around buy a few local company’s I phoned Darren and he booked me in next day he turned up fixed my van very knowledgeable and great price highly recommend
Steven Jones

Recently had my 2015 Jaguar XF tuned by Darren, great guy, very knowledgeable and approachable. Car now drives how it should of from the factory, extra power & mpg, much more enjoyable to drive!!
Marc Hollingworth

I reached out to Darren and his team at DTB with various enquiries relative to running a fleet of vehicles in the final mile distribution industry. After initial consultation, we decided to implement their economy remap solution across our fleet. They came out to site over night meaning no downtime on the vehicles. We are seeing an increase of an average of 24% in mpg which has resulted in a huge cost saving. I would highly recommend to anyone in the industry.
Daniel James

Steps to book in for your remap:
1. Get your quote
Find your vehicle and complete your information on our quote request form. A member of our team will reach out to you within 24 hours.
2. Book in
We'll schedule your remap appointment, as most bookings can be accommodated within 1-2 weeks of your inquiry. Our slots fill up quickly each week, so don't hesitate!
3. Get your remap
On the scheduled day, we will confirm your appointment and carry out the upgrade of your vehicle's software. After the upgrade is completed, we will take the vehicle for a test drive to guarantee your satisfaction!

















