Brand: B&M Manufacturer's Part Number: 20234 Part Type: Automatic Transmission Modulators Product Line: B&M Vacuum Modulators Automotive Fittings Part Number: BMM-20234 UPC: 019695202347 Modulator Valve Material: Steel Modulator Valve Finish: Gold iridited Quantity: Sold individually. Description: B&M adjustable vacuum modulators let you adjust your shift points within a range of 2 to 4 mph. With a gold cadmium finish and an O-ring seal to stop leaks, they will look as good as they work.