Pro-Billet is Holleys most popular distributor and they require an Ignition Controller such as a MSD 6AL or 7AL-2, ACCEL or Mallory Ignition Control. The distributor has a 2-pin connector that plugs directly into most aftermarket CD Ignition control boxes.
MSD - Pro-Billet Distributor - Chevrolet V8 - Black
MSD - Pro-Billet Distributor - Chevrolet V8 - Red
MSD - Pro-Billet Distributor - Chevrolet V8 - Black
MSD - Street Pro-Billet - Vacuum Advance - Chevrolet V8 - Red
MSD - Pro-Billet Distributor - Vacuum Advance - Chevrolet V8 - Black
MSD - Pro-Billet Distributor - Chevrolet V8 - Red
MSD - Slip Collar Distributor - Chevrolet V8 - Red
MSD - Pro-Billet Small Diameter Distributor - Chevrolet V8 - Red
MSD - Pro-Billet Distributor - Locked-out timing - Chevrolet V8 - Black
MSD - Pro-Billet Distributor - Even-Fire - Chevrolet V6 - Red
MSD - Marine Certified Distributor - Chevrolet V8
MSD - Dual Pickup Distributor - Chevrolet V8 - Red
MSD - Marine Certified Distributor - Chevrolet V8 - Black
MSD - Pro-Billet Small Diameter Distributor - Chevrolet V8 - Black
MSD - Pro-Billet Distributor - Extra Tall Slip Collar - Chevrolet
MSD - Distributor - Chevrolet 194 / 230 / 250 / 292 In-line 6 Cylinder
MSD - Pro-Billet Distributor - Holden V8 - Red
MSD - Pro-Billet Distributor with Vacuum Advance - Cadillac V8
MSD - Pro-Billet Small Diameter Distributor - Chevrolet V8 - Red
MSD - Pro-Billet Distributor - Flat Top / Crab Cap - Chevrolet
MSD - Pro-Billet Tach Drive Distributor - Vacuum Advance - Corvette 63-74 V8
MSD - Pro-Billet Racing Distributor - Chevrolet
One of the most important features of the MSD Pro-Billet Distributors is the adjustable mechanical advance assembly. The mechanical advance, sometimes referred to as centrifugal advance, allows you to accurately and easily modify the advance curve to match your specific application. MSD engineers have spent many hours at the dyno controls and in our labs perfecting this great distributor feature.
A variety of timing curves can be achieved simply by changing the advance springs and stop bushing. The stop bushing determines the amount of mechanical advance that can be achieved. Each distributor is equipped from the factory with the blue (21°) bushing installed with five other bushings included; Red allows 28°, Silver 25°, Green 23°, Purple 19° and Black for 18°.
The springs determine the rate, or how fast the advance occurs. Each distributor comes with two heavy silver springs installed which give the curve the slowest advance rate. There are also two sets of springs with different tensions included; blue and light silver, which can be mixed and matched to achieve a variety of advance rates.
The charts to the left illustrate the variety of ignition timing curves you can achieve by simply changing the springs and stop bushing.
Most MSD Distributors must be used with an MSD Ignition Control. The Ready-to-Run models and the O.E. style distributors do not require an MSD Ignition.