B&M Modulator - 20234
$51.95
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B&M Modulator - 20234
$51.95
The B&M vacuum modulator is fully adjustable, allowing you to fine-tune transmission shift points and shift feel. Turning the adjustment screw changes diaphragm preload to raise or lower part-throttle shift points and line pressure. It is designed for GM TH350 and TH400 automatic transmissions.