Turbo 350 vacuum modulator Turbo 400 vacuum modulator by B&M 20234. B&M's Turbo 350 and Turbo 400 vacuum modulator is fully adjustable, this allows you to tailor your shift points to within a range of 2-4 mph. Comes supplied pre-adjusted for normal shift points.
NOTE: If you engine has a big camshaft and your engine does not make adequate vacuum, you will not be able to make the stock or B&M modulator work properly, usually resulting in late, hard shifts.
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