Exactly as title implies. We have developed a dual pressure valvebody. The VB has constant pressure of 250-275 in 1,2,3 and normal TV operation in 4th. You get the best of both worlds. Racing your car in 3rd takes the TV cable and line rise out of the picture. 4th gear you have TV modulated shifts again. IMO much better than constant pressure system as you don't deal with hi line in light throttle situations. More details to come.