Track drivers
A factory Vmax that ends the fun halfway down the straight.
Limiters · Daventry
Speed & rev limiters in Daventry.
Limiters set by you, not the factory.
Vmax, speed limiter and rev limiter adjustment written into your custom file — for track use, for vans still carrying a delivery-fleet limit, and for engines that deserve their full rev range.
Vmax & speed
limiters
RPM limit
where safe
In your file
not a plug-in box
Speed & rev limiters
Where factory limiters come from
Almost every limiter in a modern vehicle is a business decision, not an engineering one: a tyre rating, a market agreement, a fleet policy, an insurance band, or a gap deliberately left between two models. The hardware is usually happy well beyond it.
Because the limit lives in the calibration, it moves with the calibration. When we write your file we can lift a fleet-imposed van limit, restore a model's proper Vmax for track use, or raise a conservative rev limiter where the engine genuinely allows it.
What we will not do is remove a limiter your tyres, brakes or gearbox cannot live with. Every change is checked against what the rest of the vehicle can take.
KESS3 · K-TAGGenuine tools, genuine files
Road-use notice: UK national speed limits apply regardless of what a vehicle is capable of. Limiter changes are supplied for track use and for vehicles whose factory limit is a fleet or delivery setting — never as an invitation to break the law on the road.
At a glance
- Vmax and speed limiter adjustment inside your custom file
- Fleet/delivery limits on ex-fleet vans lifted where appropriate
- RPM limiter raised only where the engine allows it
- Tyre speed rating checked before any Vmax change
- Fully reversible — original calibration saved first
The result
Who asks for this
Van operators
Ex-fleet vehicles still carrying the previous owner's 70mph limiter.
Motorsport builds
Vehicles that need the rev range the engine was designed to use.
Tuned cars
A limiter that no longer matches the power the engine now makes.
How it works
Three steps. One visit.
- 1
Tell us the vehicle
And how it is used — track, ex-fleet van, competition build.
- 2
We check the limits
Tyres, brakes and drivetrain before anything is raised.
- 3
Written into your file
Flashed and road-checked with your remap in the same visit.
Good to know
Questions we hear every week.
Is removing a speed limiter legal?
The change itself is a calibration setting, but UK speed limits apply to the driver at all times. We supply limiter changes for track use and for vehicles carrying fleet-imposed limits, and we say so plainly.
Will it damage the engine?
Not when it is done against the hardware. That is exactly why we check tyre ratings and drivetrain limits before raising anything.
Can the rev limiter go up on any car?
No. On some engines there is genuine headroom; on others the factory limit is already at the valvetrain limit. We will tell you which yours is.
Ask what your vehicle can safely have.
Check your gains and book a slot — limiter work is written into the same custom file.
Book your slot