B&M #20234 Vacuum Modulator, TH350/TH400 Transmission, Each.
These B&M adjustable vacuum modulators let you adjust your shift points within a range of 2-4 mph. With a gold cadmium finish and an O-ring seal to stop leaks, they will look as good as they work.
B&M Vacuum Modulators
Automatic Transmission Modulators
Modulator Valve Material:
Modulator Valve Finish: