Speed Limiter Removal
UNLOCK · DE-RESTRICT · RELEASE
Manufacturers cap many cars and vans to an electronic top speed in software — 155 mph on a lot of performance cars, far lower on commercial vans. I can remove that software limit on a fully mobile basis, strictly for track, motorsport or legally de-restricted roads. Please read the safety and legal notice below before enquiring.
Important safety & legal notice — please read
Your tyres must be rated for the vehicle’s new potential top speed. Exceeding a tyre’s speed rating can cause a catastrophic blowout. Higher speeds also place extreme demands on brakes, cooling and other components.
Removing a limiter on a leased, fleet or regulated commercial vehicle (such as an HGV) may breach transport law. For that reason, limiter removal is supplied strictly for track use, motorsport events, or legally de-restricted roads such as the German Autobahn. If you’re unsure whether your vehicle qualifies, please ask before booking.
The limits I can remove
Not every speed limit is the same — they’re set for different reasons, and the benefit of removing them depends on the vehicle. Here are the three common types:
Factory performance limits
Many high-performance cars — BMW, Mercedes-Benz, Audi and others — are electronically capped at 155 mph by a long-standing manufacturer agreement, not by the car’s actual capability. Removing it unlocks the car’s true track potential.
Commercial fleet limits
Fleet and rental vans are often restricted to lower speeds — 56, 60 or 70 mph — to cut fuel costs and manage drivers. Once a van is sold to a private owner, that restriction can be removed to restore normal motorway overtaking.
Import restrictions
Cars imported from countries such as Japan often carry a lower factory limit — around 112 mph / 180 km/h — that doesn’t match motorway speeds elsewhere. Removing it brings the car in line with local roads.
What it does — and what it doesn’t
It unlocks the speed range, not more power
Removing a limiter doesn’t add horsepower or torque. It simply lifts the software ceiling so the car can reach the top speed its engine and gearing already allow.
The car reaches its true top speed
With the limit gone, the vehicle will keep accelerating until it hits its natural mechanical or aerodynamic limit rather than stopping at the software cap.
It asks more of the car
Running beyond factory-limited speeds puts real stress on tyres, brakes and cooling. The car needs to be in good health and correctly rated for it — which is why the safety notice above matters.
At a glance
A quick summary of the common limits, why they’re set, and what removing them gives you — for track, motorsport or legally de-restricted roads.
VEHICLE TYPE
STANDARD LIMIT
REASON FOR LIMIT
BENEFIT OF REMOVAL
Performance cars
155 mph (250 km/h)
Manufacturer agreements and safety
Unlocks the car’s true track capability
Commercial vans
56–70 mph
Fuel economy and fleet safety
Restores normal motorway overtaking
Imported cars
112 mph (180 km/h)
Country-specific regulations
Matches local motorway speeds
How I work
Limiter removal is carried out fully mobile across Bridgend, Cardiff, Swansea and the M4 corridor. Your original ECU file is always read and saved first, so the vehicle can be returned to standard at any time.
I’ll always be straight with you about the safety and legal position. This work is supplied strictly for track, motorsport or legally de-restricted roads — and only where the vehicle and its tyres are rated for it. If that’s not the case, I’ll tell you rather than carry out work that isn’t safe or legal for how you’ll use the car.