Services & options
Pop & bang
Pop & bang (crackle, burble) creates controlled detonations in the exhaust on throttle lift-off, by retarding ignition and keeping a small fuel injection on overrun. Done wrong, it melts catalysts and exhaust valves. Done right, it is a crowd-pleaser that stays mechanically safe.
We calibrate the effect per engine: activation window, RPM range, intensity and duration, with petrol and diesel variants. Tell us how aggressive the customer wants it and whether a catalyst is still fitted.
What the file includes
- ✓Adjustable intensity: subtle burble to aggressive bangs
- ✓Safe calibration protecting valves and turbo
- ✓Petrol and diesel versions available
- ✓Can be combined with Stage 1/2 and decat
What happens inside the ECU
Crackle on lift-off is not an added sound: it is combustion moved downstream. On overrun the ECU normally cuts injection; we keep it alive for a moment, retard ignition heavily, and part of the combustion finishes in the exhaust. The detonation is real, and so is the heat it produces.
Everything therefore rides on the dosage: activation window, RPM range, duration, mixture and ignition retard. Too aggressive and the effect cooks a catalyst, tires exhaust valves and a turbine. We calibrate engine by engine, taking into account what is left in the exhaust line — a catalysed car will not take the same settings as a decatted one — and we would rather discuss the setting up front than a complaint three months later.
What this file does not do
This option adds no power: it moves combustion into the exhaust, and that is all. Whatever sits there takes it — catalyst, exhaust valves, turbine — the more so as the setting gets aggressive, and a factory exhaust does not forgive what a decatted one accepts.
Nor can it be switched off at will: unless the platform provides a mode that lends itself to it, the effect is calibrated in the file, not driven from the cabin. And the sound obtained depends on the engine, the line and the exhaust volume: two cars set to the same intensity do not sound alike, and noise levels remain regulated on public roads.
What you send us
- →The complete original read of the engine ECU.
- →The intensity you want, in plain words: discreet, pronounced, or show car.
- →What is left in the exhaust line: factory catalyst, sports catalyst, or decatted.
- →Make, model, engine, gearbox and year; the intended use if the car sees track days.
Turnaround and tokens
60 minutes maximum during opening hours for a file already developed on that reference.
Mon–Fri 8:00–18:00 · Sat 9:00–16:00 · Sun closed (Brussels time)
Median measured over the last six months: 20 minutes.
A file never developed for that reference means custom work: we tell you the turnaround before your tokens are committed, never after.
What we have already delivered
We have delivered this option across 3 makes and 4 different ECU references.
Files actually handled in our workshop, read on 25 September 2026. This is not a compatibility list: a vehicle outside these makes is not a vehicle we turn down.
Check access to your ECU
Before ordering, the real question is which route your tool uses to read that ECU. These pages gather what the tool vendors announced, reference by reference, with the dates.
Frequently asked questions
Does pop & bang damage the engine?
A properly calibrated map keeps exhaust gas temperature and detonation energy within safe limits. We recommend a decat or sports cat for the strongest settings.
Does it work on diesel engines?
Yes, with a diesel-specific strategy. The sound signature is different from petrol but the lift-off effect is clearly there.
Can the customer switch it on and off?
On many platforms we can bind the effect to a driving mode (e.g. Sport only). Mention it when uploading and we will confirm feasibility for that ECU.
Ready to send your file?
Create your professional account, buy tokens and upload your original read. Your custom file comes back in 60 minutes maximum during opening hours, with a live estimate.
Live estimate · 60 min max during opening hours