Our in-house Stage3 4L80E build- the transmission used in our regular cab Duramax race truck! Consisting of new clutches, steels, GPZ frictions, bushings, EPC solenoid, valve body plate, rollerized output shaft, Sonnax main shaft, manifold pressure switch, internal harness, sprags, HD 34 element sprag, Sonnax boost valve, billet budget input shaft, billet rollerized forward hub, six-clutch direct setup, billet overdrive carrier, more hydraulic modifications and in-house shift kit. Torque converter sold separately.This transmission comes with a 1-year unlimited-mile warranty. Also includes inspection and cleaning of all hard parts, and complimentary hot-flush while transmission is out.