Click to enlargeGM Vacuum Modulator

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.


Turbo 350 Turbo 400 Vacuum Modulator B&M 20234 20234$28.99
PayPal Acceptance Mark




We welcome CANADIAN customers! For ordering information, click on "Orders To Canada" at the top left side of this page.

We will not ship to freight forwarding companies.

PAYMENT METHODS: PayPal, Visa, Mastercard, Discover, American Express, money orders.

ecommerce provided by Yahoo! Small Business