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Popular Services
JM Performance – Your Trusted Partner for Automotive Excellence
At JM Performance, we specialise in performance tuning, ECU remapping, and vehicle upgrades designed to unlock the full potential of your car. Drivers across Wiltshire, Bristol, and Oxfordshire choose us for our commitment to safety, precision, and complete satisfaction. With years of hands-on experience and industry-leading knowledge, we’ve built a strong reputation as one of the region’s most trusted performance specialists.
We offer a wide range of performance solutions to help you get the most out of your vehicle. Our most popular services include:

EGR & DPF ADJUSTMENT
RECALIBRATION & DELETION
Need an alternative to EGR / DPF replacement?
(For track use only.)

SPEED LIMITERS
ADJUSTMENT & REMOVAL
VMAX is the maximum restriction of speed on a vehicle, this can be modified to suit. Especially useful for commercial vehicles.

ADBLUE
BESPOKE SOLUTIONS
ADBLUE Countdown Removal, the ultimate solution for those seeking to eliminate AdBlue systems beyond economical repair. (For track use only.)

REMAPPING
VEHICLE PERFORMANCE
Improve your vehicle's power, economy/ MPG or towing torque with our tailored solutions. Expertly written for milage and modifications.

ECU CLONE
NEW & USED
Adapt new and used control modules to vehicles including damaged data retrieval from damaged ECU's. Clone the immobiliser data.

ONLINE CODING
BESPOKE SOLUTIONS
From retrofit cruise control to coding of new modules. We offer a variety of unique bespoke specialist solutions which are tailored to suit your needs.

CARBON CLEANING
SPECIAL CLEANING SERVICE
Carbon Cleaning solutions for accumulated soot deposits, preventative maintenance.

DIAGNOSTICS
VEHICLE HEALTH CHECK
Using the latest diagnostic equipment such as AUTEL, TOPDON, SNAP-ON and OEM Dealer tools.

WORKSHOP
MECHANICAL WORKSHOP
Get in contact to find your nearest authorised JM Performance & Powerflow approved dealer.
Expert Mechanics
Wide Service Area
Flexible Payment Options
Competitive Prices


