This configuration increases torque and horsepower throughout the rpm range, with up to 24% (Long Drag Pipes) or 45% (2-1-2 MegaCone Pipes) increase at peak over stock. Stage III for 98 cu. in.: Complete kit of gaskets necessary for installation of Stage III components. Stage IV for 98 cu. in.: Complete kit of gaskets necessary for installation of Stage IV components. Stage III or IV for 102 cu. in.: Complete kit of gaskets for installation of Stage III or IV components.