If you car, truck or SUV has a high performance engine, then you know that you need a high performance transmission as well as high performance components with your transmission. You want to put as much power on the pavement as possible and fast as possible. You want to be able to optimize the shift points on your transmission. Then you need a B&M Transmission Vacuum Modulator. This will give you all the control you need because a B&M Transmission Vacuum Modulator allows you to adjust your shift point settings and are accurate to between two and four per hour. That means your automatic transmission will shift exactly when you want to, the first time and every time. Just make sure that your camshaft produces enough vacuum. Stay with the name car lovers and trusted since 1953. When you install a B&K Transmission Vacuum on your pride and joy you are installing the finest that there is. You cannot do better. You will know that first time you drive away. All your shifts will be clean, crisp and precise and at just the RPM that you want. B&K is the name in transmissions and transmission components. You drive the best. You should buy the best. Car hobbyists certainly deserve first-rate technical help while looking at quality car parts. So of course we built a 24/7/365 technical help bureau to answer your calls. Everybody hates to pay for shipping, that's why you always get FREE shipping on every order more than $50. If you can find a better price, tell us - we will meet or beat any legitimate auto part price.