CIRCO M207E Race Brake Pads Cat Back Exhausts **This ECU calibration is for

**This ECU calibration is for 2

1957-1961 HOLDEN F SERIES FE

By ensuring a sealed system we have improved on the IAT’s of the OEM airbox whilst at the same time increasing the internal volume to reduce the pressure drop and therefore reduce pumping losses of the turbo

Naturally there might be a drop when engaging and disengaging

CIRCO M207E Race Brake Pads Cat Back Exhausts **This ECU calibration is forM207E is the Heavy Duty Endurance brake pad in the CIRCO range and has been developed from the very successful M207 race compound. Like M207, this pad has exceptionally consistent torque characteristics but with lower overall torque levels and extremely good wear rate. With temperatures in a good range this pad has shown wear rates of around 0. 5mm per hour in full race conditions.