Quick view Banks Power Banks Power 99-99.5 Ford 7.3L Big Head Actuator Assembly - 24400 Compare $253.33 $228.99 Power NOW! When turbo exhaust backpressure increases, the stock actuator prematurely blows off the seat, softening boost in the midrange and killing torque. With twice the diaphragm area and spring pressure of the stock wastegate, Banks BigHead Wastegate... Add to Cart Add to Cart