A starter air valve comprising: a housing comprising an inlet at a first end, an outlet at a second end opposite the first end, and a center portion between the first end and the second end, the outlet being fluidly connected to the inlet through a fluid passage; a first piston located within the housing between the first end and the center portion, the first piston configured to block airflow through the fluid passage when in a closed position and allow airflow through the fluid passage when in an open position; a second piston located within the housing between the second end and the center portion, the second piston configured to block airflow through the fluid passage when in a closed position and allow airflow through the fluid passage when in an open position; and characterised by further comprising a manual override system configured to move from the closed position to the open position at least one of the first piston and the second piston, and wherein: the manual override system includes a dual manual override, the dual manual override comprising: a first manual override having a first input point operably connected to the first piston through a first control arm, the first input point configured to rotate the first control arm when the first input point is rotated, wherein the first piston moves from the closed position to the open position when the first control arm is rotated, and wherein the first manual override further comprises: a first ball detent system operable to lock the first manual override in a first open position, wherein the first ball detent system further comprises: a first plate having a first open hole at the first open position; a first ball located opposite the first plate; and a first biasing mechanism configured to press first ball against the first plate and secure the first ball in the first open hole when first ball detent system is in the first open position. a housing comprising an inlet at a first end, an outlet at a second end opposite the first end, and a center portion between the first end and the second end, the outlet being fluidly connected to the inlet through a fluid passage; a first piston located within the housing between the first end and the center portion, the first piston configured to block airflow through the fluid passage when in a closed position and allow airflow through the fluid passage when in an open position; a second piston located within the housing between the second end and the center portion, the second piston configured to block airflow through the fluid passage when in a closed position and allow airflow through the fluid passage when in an open position; and characterised by further comprising a manual override system configured to move from the closed position to the open position at least one of the first piston and the second piston, and wherein: the manual override system includes a dual manual override, the dual manual override comprising: a first manual override having a first input point operably connected to the first piston through a first control arm, the first input point configured to rotate the first control arm when the first input point is rotated, wherein the first piston moves from the closed position to the open position when the first control arm is rotated, and wherein the first manual override further comprises: a first ball detent system operable to lock the first manual override in a first open position, wherein the first ball detent system further comprises: a first plate having a first open hole at the first open position; a first ball located opposite the first plate; and a first biasing mechanism configured to press first ball against the first plate and secure the first ball in the first open hole when first ball detent system is in the first open position. a first plate having a first open hole at the first open position; a first ball located opposite the first plate; and a first biasing mechanism configured to press first ball against the first plate and secure the first ball in the first open hole when first ball detent system is in the first open position.