The ProMAX Performance chips for the 968 normally aspirated models have been extensively developed to provide not only a power increase, but also improved smoother running.
All flat spots and anomalies have been engineered out of the original compromise chip (ECU EPROM). To ensure that emissions are not effected, changes beneath 3,000 rpm are minimal. The timing curve on these chips is substantially smoother than the original with the often pronounced step in the mid-range made more progressive.
Power gains at the top end are between 5-10%. Power increases of up to 20% have been recorded on cars fitted with a cone type air filter and free flowing exhaust.
NOTE: For 968 models, there are 4 types of chip. 2 for the USA market and 2 for ROW (Rest of World). USA: 7100A or 7700AT, ROW: 7100R or 7700RT. 7700 only advisable if your engine is in good shape or you want a higher RPM limit for track use.