Advertised gains are estimates of HP and Torque are gains in ideal conditions and typically show the largest possible change.  Actual gains are dependent on the fuel quality, supporting modifications, altitude, ambient temperature, engine condition and other factors.

Fuel quality is very important!.  Low quality, old, and/or low octane fuel will greatly impact engine output and potentially even engine health.  Top tier brand premium fuels should always be used to achieve the best results possible.

Temperature, humidity, altitude, and air density all impact engine performance.  Heat, high humidity, and thin air will all work towards reducing engine output

Higher KM engines generally have lower compression, increased carbon deposits, and timing chain / cam wear. These factors can and will impact engine output.  Properly maintained engines will have better performance than abused or neglected engines.

Supporting modifications – The highest power levels require supporting modifications.  Depending on the engine, this could mean forged internals, built transmissions, upgraded fuel systems, E85 mixes, port injection etc.

 To reiterate ZAC Motorsport warranty terms (details can be found here), do not cover any of the following damages or items:

• Damages to and/or failure of any third party (not supplied by ZAC) components or equipment on a vehicle including, but not limited to, the engine, electrical system, transmission and differentials.
• Damage caused by , normal wear and tear, or damage to a vehicle or engine caused by  any tuning, “Acts of God” or any circumstance whatsoever including, but not limited to, collision whilst testing on the road or dyno,or engine failure.
• Any costs incurred for towing or downtime of the vehicle.
• Any rental vehicle costs
• Any labor costs to diagnose problems or to remove or replace the our ZAC Motorsport products; or any damage caused by the use of another company’s product.
• Any shipping costs.