Corvette Servo for the 700R4 (4L60), 4L60E, 4l65E, 4L70E, 4L75E. This is a very high quality item made in the USA. This servo is a must for any performance, towing, RV/off-road application, but would be a nice upgrade for any 700R4 or 4L60E. Right away you'll notice faster and firmer 1-2 and 2-3 shifts. This servo will give your transmission 50% more apply pressure. Just what you need to keep from burning your transmission up under heavy load situations. This Corvette Servo Kit Comes With: * Inner Housing, Servo * Piston, Servo 2nd Apply * 2nd Apply Piston (Inner) 1.642" (Teflon) Scarf cut seal ring * O-Ring, Servo Cover (Inner Red) *O-ring, Servo Cover (Outer Blue)