Product Description
Fits: 700R4, 200-R4 · 1981-up
Boost valves sized at .500 inches in diameter, made by TransGo for GM 700R4 and 200-4R automatic transmissions, 1981-on.
TransGo lists these valves for competition, racing, pro-street, Super HP and Big Block applications, and describes them as giving maximum pressure and shift feel in those builds.