For those of you who have upgraded to larger calipers, as well as an upgraded brake system, then the TeraFlex Brake Master Cylinder System features an oversized bore, to compensate for the larger components.
This brake master cylinder will improve braking performance, as well as braking response because the distribution of the hydraulics will be more efficient.
Also note that specific steps must be taken when bleeding the brake system. A bench bleed is recommended before installing the master cylinder into the vehicle. Slowly pumping the pedal during the bleed process is recommended to avoid damaging the seals.
Please note that 12+ vehicles do not need this item.