A very important and often neglected engine system is the ignition system. Most people only think about the spark plugs and maybe the distributor, but in fact, there are many critical components to the ignition system, and it is timed and controlled to some of the tightest tolerances of any engine component. The timing of the ignition system is measured in milliseconds, and getting the best possible timing is critical for engine performance. Poor timing can even lead to engine damage. That is why you should install an Accel vacuum advance. Like all Accel ignition products, the Accel vacuum advance is a high quality part that can give you some serious performance upgrades. You will see the most gains out of your new Accel vacuum advance if you install it in conjunction with other high quality Accel ignition components, such as the Accel ignition coil and Accel spark plug wires. Accel has been an industry leader for over twenty-five years in the design and manufacture of high quality ignition components and engine intake systems, so you can be confident that when you install the Accel vacuum advance, you are installing a part that is manufactured to the highest standards. Shoppers definitely deserve superlative customer support when looking at dependable auto parts for their car or truck. That's why we established an always-open customer support desk to support you with your questions. To make a good deal even better, there is always FREE shipping for every order at least $50. If you find a better price, tell us - we will meet or beat any advertised price for auto parts.